CN107497815A - Vent cabinet - Google Patents
Vent cabinet Download PDFInfo
- Publication number
- CN107497815A CN107497815A CN201710939219.1A CN201710939219A CN107497815A CN 107497815 A CN107497815 A CN 107497815A CN 201710939219 A CN201710939219 A CN 201710939219A CN 107497815 A CN107497815 A CN 107497815A
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
- B08B15/023—Fume cabinets or cupboards, e.g. for laboratories
Landscapes
- Ventilation (AREA)
- Devices For Use In Laboratory Experiments (AREA)
Abstract
The present invention 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 the top of cabinet 100 that side, mend wind passage 301 can include wind-supplying mouth 302 rearward；Wind-supplying mouth 302 is installed on the lower edge of cabinet opening 101, and deflector 400 is stood on rear side of the inner chamber of cabinet 100, and multiple through holes 401 are provided with deflector 400.In addition, the side wall of cabinet 100 is hollow structure, mend wind passage 301 connects along side wall with mending wind inlet 303 and wind-supplying mouth 302.Vent cabinet provided by the invention, potential safety hazard can be excluded, prevent that pernicious gas overflows in cabinet, while also there is the characteristics of simple in construction, low manufacture cost.
Description
Technical field
The present invention relates to equipment, more particularly to a kind of vent cabinet.
Background technology
Vent cabinet (also known as fume hood or laboratory hood) is used to catch, accommodate, scavenge and pernicious gas, builds safe
Working environment, prevent user of service from sucking waste gas or pernicious gas and causing life threatening, health.Traditional vent cabinet is by arranging
Air port connects exhaust fan, or the wind output channel of exhaust outlet and the large-scale exhaust fan of building is connected, and utilizes air draft wind
The swabbing action of machine drains the gas in vent cabinet working chamber, and surrounding air is introduced at the open front of vent cabinet, together
When with powerful blower fan, 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 control and discharge function of the vent cabinet to harmful substance in air more have
Effect, it is therefore desirable to by the heating ventilation air-conditioning system of building to the space using the vent cabinet, such as laboratory, fill into a large amount of skies
Gas replaces from the surrounding air for being pumped into vent cabinet working chamber.It is laboratory that air due to filling into laboratory, which belongs to supply,
A part for surrounding air, it must be processed to identical surrounding air degree to ensure laboratory work environmental amenity
And security, therefore, the building where the use of tradition ventilation cabinet typically results in laboratory etc. produces very big energy consumption.This
Outside, above-mentioned air flow, the generation vortex type air tissue near the exhaust outlet of vent cabinet, open front is frequently resulted in.
In this case, no matter the speed for the air being sucked from open front is how many, if the air fluidic structures in working chamber have unrest
Stream and vortex will result in the risk that the air in working chamber is spilt into outside open front from vent cabinet working chamber, to experimenter's
Health and safety constitutes a threat to.
Publication No. CN106140769A patent document, air conditioning energy consumption can be reduced, suppress working chamber by disclosing one kind
The overflow of interior harmful substance, and installation cost is low and vent cabinet that the uniformity of product quality is high.Wherein, disclose and mend 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 bottom.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 provided with the top of vent cabinet open front, the second wind-supplying mouth A2 is provided with the lower section of open front, in cabinet
The top and front side of above-mentioned antetheca is provided with the 3rd wind-supplying mouth A3.
Although the vent cabinet has preferable energy-saving effect, it has also been found that there is lower column 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 turns into benefit
Fill air.Now, when wind is mended in the wind-supplying mouth of top two or one of them offer, because the suction of exhaust system is led to air-flow
Draw, and guiding of the benefit wind to air-flow of air-makeup system, up mend between general mood stream and open front supplement air (circle in such as Fig. 1
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
May.If now outside have interference air-flow to occur, for example someone passes by, or the arm disengaging of operator, destroys small vortex
Balance, the pernicious gas that may cause to be involved in small vortex overflow on a small quantity.Further, since the vent cabinet is provided with three benefit wind
Mouthful, cause complex manufacturing, manufacturing cost height；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 very high requirement to the control accuracy of air-makeup system.
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 think that this New of Air cabinet has energy-conservation, operation is comfortable, control effect
The advantages of good.In fact, this structure by air curtain cut-off internal and external environment is very high for the environmental requirement residing for laboratory hood,
The walking about of personnel, thermal convection current, air-conditioning blowing direction, crosscurrent caused by indoor air supplying and exhausting system etc. influence very on air curtain
Greatly, air curtain fracture failure may all be caused.Because air curtain is close to operator, once air curtain ruptures, the air curtain of gas in cabinet is carried
The serious consequence for the life and health that easily damaged on the contrary to operator.In addition, when operating personnel use above-mentioned air-curtain type air draft
During cabinet, the air-flow that air outlet is sent out is influenceed to form air curtain by the push of air outlet and the suction of exhaust outlet simultaneously.When operator makes
During with this laboratory hood, arm necessarily passes through air curtain, now, air-supply air-flow from bottom to top, it is most likely that along operator's arm
The position of lower lateral operator overflow.That is, the wind that air outlet is sent out, in by cabinet after gaseous contamination, is present from row
The possibility that wind cabinet is overflowed, and because the wind direction of submitting is the nose that faces operator from bottom to top, once this vent cabinet gas
Curtain rupture, the air containing pollutant can be fed directly into the respiratory tract of operating personnel, cause very serious safety hazard.
The content of the invention
The embodiment of the present invention can provide a kind of vent cabinet, can exclude potential safety hazard, prevent that pernicious gas overflows in cabinet,
Also there is the characteristics of simple in construction, low manufacture cost simultaneously.
The embodiment of the present invention provides a kind of vent cabinet, including front side is provided with the cabinet of opening, in addition to：
The exhaust outlet in cabinet is connected, exhaust outlet is located at the top of cabinet side rearward；
Mend wind passage including wind-supplying mouth；And
Stand in cabinet the deflector of side rearward, deflector includes substrate and rake, substrate lower end and bottom of cabinet bulk it
Between, between rake lower end and substrate leave space,
Wherein,
Wind-supplying mouth is located at below opening, and rake is arranged to its front end and covers exhaust outlet when seeing from below.
Preferably, in terms of front side, exhaust outlet is centrally located at the centre of the left and right sides in cabinet；Side is seen from the left or right, row
Air port is centrally located in cabinet side rearward.
Preferably, side is seen from the left or right, exhaust outlet be centrally 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 more than or equal to the width of cabinet, makes wind-supplying mouth to opening or so two
End extends and covers opening.
Preferably, side is seen from the left or right, and curved connection or chamfering connection, make benefit between the top side of wind-supplying mouth and rear side
Upwardly and rearwardly blow in air port.
Further, arc is quadrant arc.
Preferably, be located at cabinet front inner in same perpendicular on the outside of wind-supplying mouth, make through wind-supplying mouth submitting to
On benefit general mood stream covering cabinet opening.
Preferably, be provided with guide plate in wind-supplying mouth, guide plate wind-supplying mouth is separated into the outside wind-supplying mouth that points up with
Point to the inner side wind-supplying mouth in cabinet.
Further, the cross section of guide plate is curved, for guiding the benefit wind airflow direction sent out through inner side wind-supplying mouth.
Further, guide plate lower end part is in mend wind passage, and bottom is used for distributing outside wind-supplying mouth and inner side is mended
The benefit wind air quantity in air port.
Preferably, deflector substrate is provided 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, it is up-narrow and down-wide to be arranged at the through hole of deflector substrate, radial arrangement.
Further, deflector substrate also includes deflector top and deflector bottom, deflector bottom with deflector
Space is left between portion.
Preferably, front side top is provided with hang plate in cabinet；The upward bearing of trend of hang plate and rake are upward to be prolonged
Direction shape is stretched to have angle.
Preferably, in addition to mend wind passage the benefit wind blower fan connected, it is adjustable power type blower fan to mend wind blower fan.
Further, wind blower fan is mended in mend wind passage.
Preferably, in addition to mend wind passage the benefit air valve connected, benefit air valve are aperture type variable valve.
Preferably, vent cabinet side wall and/or lower wall are hollow structure, and mend wind passage is located at the side wall and/or lower wall of cabinet.
Preferably, in addition to：
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 connect outside in cabinet with cabinet, and bottom passageway outlet is located in cabinet,
Wherein, vent cabinet is arranged to 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 be located in same perpendicular, make through wind-supplying mouth submitting to
On benefit general mood stream covering cabinet opening.
Further, in addition to：
Position sensor, for detecting the position of sliding door；And
The control unit being connected with position sensor,
Wherein, guide plate also 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 and rotated, for adjusting the air quantity of the inner side wind-supplying mouth separated by guide plate and outside wind-supplying mouth point
Match somebody with somebody.
The embodiment of the present invention also provides the control method of above-mentioned vent cabinet, including：
When it is 0%~4% that sliding door movement, which causes opening aperture, adjustable plate free end is set as connecing with mend wind passage bottom plate
Touch, that is, close outside wind-supplying mouth；
When it is 5%~60% that sliding door movement, which causes 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 causes 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, 40%~69% air-flow sent out by wind-supplying mouth of exhaust air rate supplements.
The vent cabinet provided according to embodiments of the present invention, it is whole to eliminate all air draft air-flows being discharged to beyond vent cabinet
By the active supplemental air flow of air-makeup system or all by cabinet outside the potential safety hazard supplemented of passive supplemental air flow, by only existing
Wind-supplying mouth is set below cabinet opening, and controls exhaust air rate, actively mend air quantity and passively benefit air quantity (refers to when exhaust system is from ventilation
In cabinet during air draft, the surrounding air beyond vent cabinet is influenceed to enter the air-flow in vent cabinet by the negative pressure that air draft is formed) phase
Ratio between mutually, the opening of vent cabinet is set to be formed all the time towards the one-way gas flow of exhaust outlet in cabinet, thereby may be ensured that makes
The safety of user, effectively prevent that pernicious gas overflows in cabinet.In addition, needed relative to setting in the prior art during three wind-supplying mouths
The accurately air output of three wind-supplying mouths of control, otherwise once disequilibrium effect and security with regard to lossy risk, the present invention
Due to only setting a wind-supplying mouth, relative to multiple wind-supplying mouths in structure it is more simple, production cost is lower, further increases peace
Overall coefficient.
Brief description of the drawings
Fig. 1 shows a kind of vent cabinet of prior art；
Fig. 2 shows another laboratory hood of prior art；
Fig. 3 is the structural representation for the vent cabinet that one embodiment of the invention provides；
Fig. 4 is the top view of structural representation shown in Fig. 3；
Fig. 5 is wind-supplying mouth cross-sectional view；
Fig. 6 is the wind-supplying mouth cross-sectional view for the vent cabinet that another embodiment of the present invention provides；
Fig. 7 is the deflector structure schematic diagram for the vent cabinet that one embodiment of the invention provides；
Fig. 8 is the structural representation for the vent cabinet that another embodiment of the present invention provides；
Fig. 9 is the dimensional structure diagram for the vent cabinet that another embodiment of the present invention provides；
Figure 10-1 to Figure 10-3 shows the Boiler pressure control view for the vent cabinet that one embodiment of the invention provides；
Figure 11-1 and Figure 11-2 is vent cabinet Q provided in an embodiment of the present inventionMend=40% × QRowWhen slip detection figure it is vertical
Body figure and side view；
Figure 11-3 and Figure 11-4 is vent cabinet Q provided in an embodiment of the present inventionMend=40% × QRowWhen air velocity motion pattern
With air velocity sectional drawing；
Figure 12-1 and Figure 12-2 is vent cabinet Q provided in an embodiment of the present inventionMend=45% × QRowWhen slip detection figure it is vertical
Body figure and side view；
Figure 12-3 and Figure 12-4 is vent cabinet Q provided in an embodiment of the present inventionMend=45% × QRowWhen air velocity motion pattern
With air velocity sectional drawing；
Figure 13-1 and Figure 13-2 is vent cabinet Q provided in an embodiment of the present inventionMend=60% × QRowWhen slip detection figure it is vertical
Body figure and side view；
Figure 13-3 and Figure 13-4 is vent cabinet Q provided in an embodiment of the present inventionMend=60% × QRowWhen air velocity motion pattern
With air velocity sectional drawing；
Figure 14-1 and Figure 14-2 is vent cabinet Q provided in an embodiment of the present inventionMend=69% × QRowWhen slip detection figure it is vertical
Body figure and side view；
Figure 14-3 and Figure 14-4 is vent cabinet Q provided in an embodiment of the present inventionMend=69% × QRowWhen air velocity motion pattern
With air velocity sectional drawing；
Figure 15-1 and Figure 15-2 is vent cabinet Q provided in an embodiment of the present inventionMend=70% × QRowWhen slip detection figure it is vertical
Body figure and side view；
Figure 15-3 and Figure 15-4 is vent cabinet Q provided in an embodiment of the present inventionMend=70% × QRowWhen air velocity motion pattern
With air velocity sectional drawing.
Embodiment
Presently in connection with accompanying drawing, better embodiment of the invention is discussed in detail.Although description of the invention will combine this compared with
Good embodiment is introduced together, but this feature for not representing this invention is only limitted to the embodiment.Implement on the contrary, combining
Mode make the purpose that invention is introduced be in order to cover other selections that the claim and being possible to based on the present invention extends or
Transformation.In order to which the depth provided to the present invention understands, many concrete details will be included in describing below.The present invention can not also
Implemented using these details.In addition, in order to avoid chaotic or obscure the emphasis of the present invention, some details will in the de-scription by
Omit.
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 locus and define,
It should not be construed as limiting the invention.
Fig. 3 is the structural representation for the vent cabinet that one embodiment of the invention provides.As shown in figure 3, the vent cabinet can wrap
Include the cabinet 100 that opening 101 is provided with front side, exhaust outlet 201, mend wind passage 301, deflector 400.Wherein, cabinet 100 is connected
Interior exhaust outlet 201 is arranged at the top of cabinet 100 side rearward.Mend wind passage 301 can include wind-supplying mouth 302, wherein, wind-supplying mouth
302 are arranged at the lower section of cabinet opening 101, and mend wind passage 301 is arranged at the bottom of cabinet 100.Deflector 400 is stood in cabinet 100
Side rearward, it includes substrate and rake 404, and wherein substrate is set up vertically, and rake 404 is located at the top of substrate, and under
And Shangdi tilts towards the direction of exhaust outlet 201；The upper end of rake 404 close to the top of cabinet 100, lower end close to substrate, and
Rake 404 is close to the end at the top of cabinet 100 with leaving gap 405 before the top of cabinet 100；On upward view, rake
404 cover exhaust outlet 201.Moreover, leave sky between deflector substrate and the bottom of cabinet 100, between rake 404 and substrate
Gap 405 is provided with hole, to allow air-flow to pass through at space 405 or hole.
Air draft refers to discharge gas in cabinet out of vent cabinet.In embodiments of the present invention, all gas in vent cabinet
Discharged via exhaust outlet 201.When vent cabinet air draft provided in an embodiment of the present invention, make-up gas passes through following two approach
It is 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 passively to mend
Wind, i.e., the negative pressure that make-up gas is formed by air draft are influenceed to be inhaled into or are pumped into cabinet.In working condition, exhaust air rate and benefit wind
Amount is in poised state, i.e. exhaust air rate (QRow)=mend air quantity=actively mend air quantity (QMend)+passively mends air quantity (QInhale)。
The vent cabinet that the present embodiment provides, exhaust outlet 201 can with the exhaust system in laboratory where external vent cabinet, or
The exhaust system of building, is drained into outside laboratory or outside building with the gas most at last in vent cabinet where external vent cabinet；
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, in the presence of said exhaust system, the gas in vent cabinet passes through exhaust outlet 201
Discharge, so as to produce negative pressure in the cabinet 100 of vent cabinet；Meanwhile in the presence of above-mentioned air-makeup system, extraneous fresh air
It is sent to along mend wind passage 301 through the wind-supplying mouth 302 positioned at the lower section of the opening of cabinet 100 101 in cabinet, 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 the base of deflector 400
The space 405 between space, rake 404 and the substrate of deflector 400 between plate and the bottom of cabinet 100, along the He of deflector 400
Passage between the rear wall of cabinet 100 reaches exhaust outlet 201, finally drains into exhaust system through exhaust outlet 201；Another part mends wind
Air-flow is influenceed 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 to exhaust outlet 201.Now, the benefit that wind air current flow is set to less than air draft air quantity, actively supplement is mended
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
Influenceed by exhaust system suction, and swept along by the benefit general mood stream sent out from wind-supplying mouth 302 and mend general mood stream together by trend together
Exhaust outlet 201 flows.Under above-mentioned arrangement, the passive benefit general mood stream entered outside in cabinet 100 by cabinet 100 is in opening 101
The one-way gas flow of ecto-entad is formed, cabinet 100 is spilt at the opening of cabinet 100 101 so as to ensure not have gas in cabinet
In addition.
Therefore, the vent cabinet that the present embodiment provides, the only wind-supplying mouth 302 for actively mending wind is provided into cabinet 100, so as to
Make actively to mend wind air quantity and air draft air quantity forms QMend=(40%~69%) × QRowRelation；Wherein, QMendFor 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, the working region in cabinet 100 during progress chemical experiment as experimenter has
Grain thing produces, and these particulate matters are likely to be harmful.When exhaust system works, taken out to being formed in cabinet 100
Inhale, draw is formed to above-mentioned particulate matter, can be visually referred to as " drawing "；When air-makeup system works, sent from wind-supplying mouth 302
The benefit general mood stream gone out, particulate matter can be promoted to be moved with air current flow direction, can be visually referred to as " pushing away ".
Fig. 4 is the top view of structural representation shown in Fig. 3.Wherein, 510 width is represented；520 represent length direction.
As shown in figure 4, in the present embodiment, exhaust outlet 201 is cylindrical, one of the top of cabinet 100 away from opening 101 is installed in
Side, i.e., side is seen from the left or right, and exhaust outlet 201 is centrally located in cabinet 100 side rearward；And its center axis is in width
On or close to the middle of cabinet 100 on 510, i.e., in terms of front side, exhaust outlet 201 is centrally 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
The distance of side be the width of vent cabinet cabinet 100 half, i.e. A/2.In other embodiments, in order to preferably and cabinet
Interference fit in 100, the centre that exhaust outlet 201 can also be arranged in cabinet 100, i.e., by the center of exhaust outlet 201 to cabinet
The distance of either side is the half of the insied width of vent cabinet cabinet 100 in 100.Such setting, exhaust outlet 201 can be made high
Efficient play air draft effect.
In an alternative embodiment of the invention, the central axis of exhaust outlet 201 on length direction 520 with rear wall in cabinet 100
Distance be a quarter of length in cabinet 100, i.e., side is seen from the left or right, before exhaust outlet 201 is centrally located in cabinet 100
At between rear side and away from rear side a quarter.Such positioning, beneficial to realizing that exhaust blower realizes the effect of " drawing ", and air-flow can be made
Stablize and be less prone to sinuous flow.
As shown in figure 3, the outside of wind-supplying mouth 302 is located in same perpendicular with the inner side of cabinet 100.Such setting can be with
Make the benefit general mood stream sent out through wind-supplying mouth 302, especially upward benefit general mood stream covering cabinet opening 101.In the present embodiment,
Wind-supplying mouth 302 extends along cabinet 100 in the direction of the width, and its width is equal to or more than the width between left and right sides in cabinet 100, makes
The benefit general mood stream covering opening 101 that wind-supplying mouth 302 is sent out.As shown in Figure 3, wind-supplying mouth 302 perpendicular to the transversal of width
Face is curved, i.e., curved connection between the top side of wind-supplying mouth 302 and rear side is seen in side from the left or right；Wind-supplying mouth 302 is upward
And rear, the benefit wind for making to be sent out by wind-supplying mouth 302 upward with cabinet 100.In other embodiments, wind-supplying mouth 302 is horizontal
Section 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 provided with wind-supplying mouth 302
310, wind-supplying mouth 302 is separated into outside wind-supplying mouth 311 and inner side wind-supplying mouth 312 by guide plate 310.In addition, guide plate 310 hangs down
It is directly curved in the cross section of width.In other embodiments, guide plate 310 can also be in inverted L-shaped or sickleshaped.It is preferred that
Wind-supplying mouth 302 is substantially divided into two parts of area equation by ground, guide plate 310 in the horizontal direction.The bottom 313 of guide plate 310
In mend wind passage 301.It will be understood by those skilled in the art that the position of regulation bottom 313 can control outside to mend wind
Mouth 311, the benefit wind allocation of the amount of air of inner side wind-supplying mouth 312.Therefore, the effect of guide plate 310 is to change wind direction, distribution air quantity.
In the vent cabinet work that the present embodiment provides, general mood stream is mended after mend wind passage 301, is divided by guide plate 310
Inner side 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 distance between the lower end of guide plate 310 and the bottom plate of mend wind passage 301 determine.The distance is bigger, the air quantity of outside wind-supplying mouth 311
(QMend outer) it is bigger, then inner side wind-supplying mouth 312 air quantity (QIn benefit) smaller；Conversely, this is apart from smaller, then the outside air quantity of wind-supplying mouth 311
(QMend outer) smaller, the air quantity (Q of inner side wind-supplying mouth 312In benefit) bigger；Mend wind air quantity QMend=QIn benefit+QMend outer.Outside wind-supplying mouth 311 formed to
On air curtain, reduce influence of the disturbance to the interior air-flow tissue of cabinet 100 in laboratory；The benefit sent out from inner side wind-supplying mouth 312
Wind " pushes away ", and exhaust system " drawing ", both are collectively forming " push-and-pull ", by pernicious gas deliver to deflector 400 and the rear wall of cabinet 100 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
" guiding gutter ", air is impossible to flow to the direction of opening 101 again after being trapped in " guiding gutter ", so as to thoroughly from exhaust outlet
Discharge, ensure safety.
Guide plate 310 in the present embodiment, due to can be formed when playing guide effect to the air-flow flowed through in some directions
Limitation, causes necessarily to lose to stream pressure, when being designed to arc, causes the pressure loss for flowing through air-flow small.
Fig. 6 is the cross-sectional view of wind-supplying mouth 302 for the vent cabinet that another embodiment of the present invention provides.As illustrated, mend
The cross section vertical with width in air port 302 can also chamfered shape, i.e., side is seen from the left or right, the top side of wind-supplying mouth 302
The chamfered shape connection between rear side.
Fig. 7 is the deflector structure schematic diagram for the vent cabinet that one embodiment of the invention provides.As shown in Figure 7, it is preferable that lead
Flowing plate 400 is provided with multiple through holes 401, and the through hole 401 positioned at deflector bottom 402 uniformly divides along horizontal width direction
Cloth；Its hole area is gradually reduced through hole 401 positioned at deflector top 403 relative to the accounting of unit area from down to up.
In other embodiments, be arranged at the through hole 401 on deflector top 403 from down to up its mutual spacing by
Gradually increase, arrangement is gradually sparse, or, single hole area is gradually reduced.In another embodiment, it is arranged at deflector top 403
The arrangement in the direction of the width from top to bottom of through hole 401 it is radial in center, i.e., in terms of front side, the arrangement of through hole 401
Along center in up-narrow and down-wide.
In the present embodiment, deflector bottom 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 bottom 402.In other implementations
In example, deflector top 403 and deflector bottom 402 can also be provided separately.No matter deflector top 403 and deflector bottom
Whether 402 be provided separately, and space 405 is preferably left between deflector bottom 402 and deflector top 403, to allow air-flow
The negative pressure formed by exhaust outlet 201 between deflector 400 and the rear wall of cabinet 100 is influenceed, and is worn along space 405 or through hole 401
Deflector 400 is crossed, to have the function that to control air flow direction.When the vent cabinet work that the present embodiment provides, inner side wind-supplying mouth
312 push the higher pollutant of concentration to deflector bottom 402 by the positive static pressure of air-supply with kinetic energy, and pollutant passes through deflector
Siphoned away behind bottom 402 by negative pressure channel behind；Outside wind-supplying mouth 311 produces one section of air curtain vertically upward, cut-off opening
Air-flow inside and outside 101, " peripheral flow effect " caused by human body produces to the internal gas flow of cabinet 100 before preventing disturbance or the cabinet outside cabinet
Influence.
So-called " peripheral flow ", refer to fluid around cylinder flow when, flow section shrinks, 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
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 hinders and disturbed, such as personnel
Walked about before opening, operating personnel stop opening or be placed in opening before instrument, can all cause the steady of cabinet interior air-flow tissue
It is qualitative to be destroyed, cause " peripheral flow effect ".The stability of cabinet interior air-flow tissue destroyed after will turbulization, meeting
Cause to produce the risk in cabinet outside gas overflowing to cabinet.
Fig. 8 is the structural representation for the vent cabinet that another embodiment of the present invention provides.As shown in figures 3 and 8, deflector
On 400 the rake 404 being connected with deflector top 403, rake 404 and deflector are additionally provided with the roof of cabinet 100
Space 405 is left between top 403.As shown in figure 8, the top of vent cabinet inner opening 101 is provided with hang plate 104；Hang plate 104
Upward bearing of trend and the upward bearing of trend shape of rake 404 have angle (not shown).
In general, the vent cabinet in running order, pollution sources are typically placed in the inner bottom part end face of 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
It is higher from the nearlyer concentration of the inner bottom part of cabinet 100, it is lower apart from more remote (such as inner top of the cabinet 100) concentration of the inner bottom part of cabinet 100.This
Embodiment provide vent cabinet in Airflow Pattern Designing theory be：
1. by rationally setting gap length between deflector bottom 402 and the bottom of cabinet 100 and located at deflector
The size of the hole area sum of multiple through holes 401 on bottom 402, row is accounted for 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 bottom 402 size in space and located at water conservancy diversion
The size of the hole area sum of multiple through holes 401 on plate top 403, accounted for via the air quantity discharged to exhaust outlet 201 herein
The 25%~30% of exhaust air rate；
3. by rationally set the space between the rake 404 of deflector 400 and deflector top 403 size and
The size in the space between rake 404 and the top of cabinet 100, 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, its negative pressure is bigger.Deflector bottom away from exhaust outlet 201
402 is relatively small due to the pressure loss caused by on-way resistance, its negative pressure.
The design of deflector 400 needs to follow requirements above, and meets following characteristics：
1. the perforate of through hole 401 on deflector bottom 402 is larger or more intensive, meet that the air-flow of 60% exhaust air rate leads to
Cross demand.Its position of opening can ensure uniform by the face wind speed of deflector bottom 402 on width simultaneously.
2. the perforate of through hole 401 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
Ask.
3. the rake 404 of deflector 400 and the inner top of cabinet 100 and to leave space 405 with deflector top 403.It is empty
The size of gap 405 can be by CFD (computational fluid dynamics Computational Fluid Dynamics english abbreviation) fluid
Analysis is drawn.Excessive gap can cause pollutant to circumvent deflector top 403 and deflector bottom 402 directly to rise to top
Portion, turbulent flow is formed at top, increases the risk spilt into outside cabinet 100.
In an alternative embodiment of the invention, mend wind passage 301, which is also communicated with, mends wind blower fan, and the benefit wind blower fan is power adjustable
Type blower fan.In other embodiments, mending wind blower fan can also be located in mend wind passage 301.Further, mend wind passage 301 is gone back
Benefit air valve can be connected, it can be aperture type variable valve to mend air valve.
In an alternative embodiment of the invention, vent cabinet lower wall is hollow structure, and mend wind passage 301 is located at the cabinet 100
Lower wall.In addition, the roof of cabinet 100 can also be hollow structure.Therefore, mend wind passage 301 can similarly pass through cabinet 100
Roof, lower wall.In other embodiments, in the roof of effective sealing, lower wall, the side wall again of hollow structure, itself can also
Used as mend wind passage 301.
Fig. 9 is the dimensional structure diagram for the vent cabinet that another embodiment of the present invention provides.As shown in figure 9, the embodiment
The vent cabinet of offer, in addition to the sliding door 106 at opening 101 is located at, sliding door 106 can be slided along opening 101, be open for adjusting
101 open area；Vent cabinet also includes bottom passageway 105, and bottom passageway 105 will be connected with external environment condition in cabinet 100, pushed up
The one end of portion's path 105 can be arranged on the top of cabinet 100, as entrance outside cabinet 100；The other end is located at cabinet 100
It is interior, as outlet.In addition, the lateral wall of wind-supplying mouth 302 is located in same perpendicular with the lateral wall of sliding door 106, make through wind-supplying mouth
The 302 benefit general mood streams sent out, especially upward benefit general mood stream covering cabinet opening 101.In other embodiments, in order that obtaining
Sliding door 106 is smooth relative to the slip of cabinet 100, often leaves larger gap between sliding door 106 and cabinet 100.Therefore,
The gap is controlled to play the effect of bottom passageway 105, and one of optional technological means, its benefit is to be separately provided
Bottom passageway 105, simplifies structure.
When the vent cabinet work that the present embodiment provides, bottom passageway 105 is located at the gas of 100 outer adjacent one end of cabinet,
Influenceed by the suction of exhaust outlet 201, entered outside vent cabinet by bottom passageway 105 or equivalent to the region of bottom passageway in cabinet,
The dusty gas of the forward side in top in cabinet 100 is likely to be present in for eliminating.Now, bottom passageway 105 is controlled as to cabinet
Interior provide passively mends wind air quantity equivalent to 5%~10% small scale of exhaust air rate, you can ensures larger to dusty gas
Dam ability, eliminate dusty gas in cabinet and overflow risk outside cabinet, and without extra blower fan 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 typically produce vortex at the top of cabinet 100 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 by bottom passageway 105 in cabinet 100
Air by above-mentioned vortex destroy and by formed vortex gas " push " deflector 400 and exhaust outlet 201 to, so as to prevent in cabinet
Gas overflows at opening 101, makes vent cabinet safer.It will be understood by those skilled in the art that the position of above-mentioned generation vortex
Put just close to station before cabinet opening 101 at the mouth and nose of operating personnel, thus in this position in the presence of vortex be it is most dangerous,
Especially when sliding door 106 is in open mode.
Mend wind passage 301 is located at by the design to cabinet of divulging information, such as regulation guide plate 310 bottom 313
In position, or regulation sliding door 106 height, when the present embodiment provide vent cabinet work when, wherein mend air quantity 40%~
69% is provided by wind-supplying mouth 302, and remaining 31%~60% is provided otherwise.For example in the present embodiment, mend wind air quantity
31%~60% provided jointly by cabinet door opening 101 and bottom passageway 105.Optimum state is that air volume adjustment ratio is：
QMend=60% × QRow；
QDoor=30% × QRow；
QIt is other=10% × QRow；
QInhale=QDoor+QIt is other。
Wherein, QRowFor exhaust air rate, QMendWind air quantity, Q are actively mended for what is sent out via wind-supplying mouth 302DoorTo be passed through outside cabinet 100
Be open the passive benefit wind air quantity being drawn at 101 in cabinet 100, QIt is otherTo be drawn into cabinet through bottom passageway 105 from cabinet 100 is outer
100 passive benefit wind air quantity.
So, pollutant caused by experiment is formed by deflector 400 and deflector 400 with rear wall in cabinet 100
Negative pressure channel, it is pumped from exhaust outlet 201.
1. when the generating capacity of pollutant is small or medium volume, pollutant is directly taken away from deflector bottom 402；
2. when pollutant volume is a large amount of, pollutant is pumped from deflector bottom 402 and deflector top 403
3. when pollutant volume is very large amount, the dirt that is not pumped via deflector bottom 402 and deflector top 403
Dye thing 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 the bottom 313 of guide plate 310.
, can also be by being hinged an adjustable plate 314 on guide plate 310 in other embodiments, adjustable plate 314 can turn around articulated section
Dynamic, close articulated section is free end for fixing end, the other end on adjustable plate 314.So, by controlling to adjust plate 314 freely
The position at end, the function that wind allocation of the amount of air is mended in control can also be reached.Furthermore it is also possible to pass through other machinery structure, such as shell fragment
Collision bead structure, connection adjustable plate 314 and sliding door 106, to realize that the position of the shift in position of sliding door 106 triggering adjustable plate 314 is adjusted
It is whole.
Figure 10-1 to Figure 10-3 is the Boiler pressure control view for the vent cabinet that one embodiment of the invention provides.As schemed
Show, C is the distance between the free end of adjustable plate 314 and the lower shoe of mend wind passage 301；D is the bottom of sliding door 106 and wind-supplying mouth
302 distance.3 working conditions that vent cabinet uses are generally：
1. the closed mode of sliding door 106, test non-operating state or without supervising experiment.The now movement of sliding door 106 causes cabinet
Body 100 be open 101 apertures be 0%~4%, the free end of adjustable plate 314 be set as with the contacts baseplate of mend wind passage 301, that is, close
Outside wind-supplying mouth 311, QMend=QIn benefit；
2. the aperture of sliding door 106 is 5%~60%, experimenter needs to carry out experimental implementation in cabinet.Now adjustable plate 314
Free end is set as 40% for the height of mend wind passage 301 with the distance of the bottom plate of mend wind passage 301, in this case, QMend outer=
40% × QMend, QIn benefit=60% × QMend；
3. the full-gear of sliding door 106, it is normally present the behavior that experimenter highly carries out experimental implementation herein, regulation
The free end of plate 314 is set as 70% for the height of mend wind passage 301 with the distance of the bottom plate of mend wind passage 301, in this case,
QMend outer=70% × QMend, QIn benefit=30% × QMend。
By Figure 10-1 to Figure 10-3, the control method for illustrating the vent cabinet that one embodiment of the invention provides can be used for.
The vent cabinet that the embodiment provides, can be further ensured that safety, prevents that pernicious gas overflows in cabinet by accurately automatically controlling
Go out.
In this embodiment, vent cabinet also includes：
Position sensor, for detecting the position of the sliding door 106；And
The control unit electrically connected with position sensor,
Wherein, guide plate 310 also includes adjustable plate 314, and adjustable plate 314 is be hinged with guide plate 310.Worked in the embodiment
When, control unit controls to adjust plate 314 and turned an angle, for adjusting by being oriented to according to the detection information of position sensor
The allocation of the amount of air for the 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 the free end of adjustable plate 314 and the lower shoe of mend wind passage 301；
D is the bottom of sliding door 106 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. the closed mode of sliding door 106, test non-operating state or without supervising experiment.The now movement of sliding door 106 causes cabinet
Body 100 be open 101 apertures be 0%~4%, the free end of adjustable plate 314 be set as with the contacts baseplate of mend wind passage 301, that is, close
Outside wind-supplying mouth 311, QMend=QIn benefit；
2. the aperture of sliding door 106 is 5%~60%, experimenter needs to carry out experimental implementation in cabinet.Now adjustable plate 314
40%, the Q that free end is set as with the distance of the bottom plate of mend wind passage 301 is the height of mend wind passage 301Mend outer=40% × QMend, QIn benefit
=60% × QMend；
3. the full-gear of sliding door 106, it is normally present the behavior that experimenter highly carries out experimental implementation herein, regulation
70%, the Q that the free end of plate 314 is set as with the distance of the bottom plate of mend wind passage 301 is the height of mend wind passage 301Mend outer=70% ×
QMend, QIn benefit=30% × QMend。
In the present embodiment, when vent cabinet air draft, according to perception of the control unit to the position of sliding door 106, to adjustable plate
The control of 314 rotational angles, following effect can be reached：Mend air quantity 40%~69% is provided by wind-supplying mouth 302, mends air quantity
31%~50% is provided by cabinet door opening 101, and remaining is mended wind air quantity and provided by bottom passageway 105.
Illustrate the beneficial effect of embodiment provided by the invention below according to experimental data.According to ANSI/ASHRAE 110-
2016 standards require " amount of leakage of laboratory hood is no more than AM0.05PPM (5e-08PPM) ".Wherein, ANSI is American National Standard
Association, formulate 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：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 QMend=480CMH, QRow=1200CMH, QMend=QRowWhen × 40%, leakage rate is -5.4396e-
011PPM；
Experiment parameter is set as QMend=540CMH, QRow=1200CMH, QMend=QRowWhen × 45%, leakage rate 8.8284e-
011PPM；
Experiment parameter is set as QMend=720CMH, QRow=1200CMH, QMend=QRowWhen × 60%, leakage rate is -1.7025e-
010PPM；
Experiment parameter is set as QMend=828CMH, QRow=1200CMH, QMend=QRowWhen × 69%, leakage rate 1.4958e-
009PPM；
Experiment parameter is set as QMend=840CMH, QRow=1200CMH, QMend=QRowWhen × 70%, leakage rate 4.0223e-
008PPM。
It can be seen that vent cabinet provided in an embodiment of the present invention, when benefit air quantity is the 40%~69% of exhaust air rate, leakage rate is remote
Standard requirement less than 5e-08PPM, fully meets safety requirements.But once QMend=QRow× 70%, leakage rate begins to connect
Nearly standard value, it is meant that potential safety hazard be present.
Figure 11-1, Figure 11-2 are vent cabinet Q provided in an embodiment of the present inventionMend=40% × QRowWhen slip detection figure it is three-dimensional
Figure and side view；Figure 11-3 and Figure 11-4 is vent cabinet Q provided in an embodiment of the present inventionMend=40% × QRowWhen air velocity streamline
Figure and air velocity sectional drawing.
Figure 12-1 and Figure 12-2 is vent cabinet Q provided in an embodiment of the present inventionMend=45% × QRowWhen slip detection figure it is vertical
Body figure and side view；Figure 12-3 and Figure 12-4 is vent cabinet Q provided in an embodiment of the present inventionMend=45% × QRowWhen air velocity stream
Line chart and air velocity sectional drawing.
Figure 13-1 and Figure 13-2 is vent cabinet Q provided in an embodiment of the present inventionMend=60% × QRowWhen slip detection figure it is vertical
Body figure and side view；Figure 13-3 and Figure 13-4 is vent cabinet Q provided in an embodiment of the present inventionMend=60% × QRowWhen air velocity stream
Line chart and air velocity sectional drawing.
Figure 14-1 and Figure 14-2 is vent cabinet Q provided in an embodiment of the present inventionMend=69% × QRowWhen slip detection figure it is vertical
Body figure and side view；Figure 14-3 and Figure 14-4 is vent cabinet Q provided in an embodiment of the present inventionMend=69% × QRowWhen air velocity stream
Line chart and air velocity sectional drawing.
By above QMend=(40%~69%) × QRowWhen each slip detection figure stereogram and side view represent search gas
Scope 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, what is represented in figure is the position of the boundary face when concentration of search gas (SF6 sulfur hexafluorides) is 0.01PPM,
As can be seen that the non-warp-wise both sides diffusion of search gas is just discharged, its border is not overflowed in the working chamber of laboratory hood all the time,
Vent cabinet ability of damming is strong, both sides No leakage, realizes the security performance of " No leakage ".
By above QMend=(40%~69%) × QRowWhen each air velocity motion pattern shown in, internal gas flow is organized as laminar flow shape
State, the spilling of internal contamination thing is prevented well.The benefit wind of wind-supplying mouth 302 is mainly drained by deflector bottom 402, opening
It is passive outside cabinet to mend wind air quantity QDoorMainly drained by deflector top 403, the passive benefit wind air quantity Q of bottom passageway 105It is otherMainly by leading
The gap of 400 rake of flowing plate 404 is drained, and complies fully with safe design requirement.Now, the rake 404 of deflector 400 and deflector
The gap exhaust air rate on top 403 is 10%, and the exhaust air rate on deflector top 403 is 30%, and the exhaust air rate of deflector bottom 402 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 exist any reverse mobile.
By above QMend=(40%~69%) × QRowWhen each air velocity sectional drawing shown in, the air-out jet of wind-supplying mouth 302
It is a fan layer flow structure, without any flow-disturbing or reverse air flow.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 occurs up and down
It is perpendicularly oriented to or opposite direction is pointed to.Except from exhaust outlet 201 is close or sky between deflector 400 and the rear wall of cabinet 100
Gas, if having in cabinet 100 arrow be up and down be perpendicularly oriented to, or have arrow toward reverse direction point to if, represent cabinet
Fluidic structures in 100 are chaotic, can produce vortex, adverse current and overflow risk during operation, the most basic safety of destruction vent cabinet
Performance requirement.
Figure 15-1 and Figure 15-2 is vent cabinet Q provided in an embodiment of the present inventionMend=70% × QRowWhen slip detection figure it is vertical
Body figure and side view；Figure 15-3 and Figure 15-4 is vent cabinet Q provided in an embodiment of the present inventionMend=70% × QRowWhen air velocity stream
Line chart and air velocity sectional drawing.
From Figure 15-2, search gas (by cabinet black portions represent) from opening 101 spill into cabinet 100 it
Outside, it is shown in the security performance requirement that vent cabinet is arranged to that vent cabinet can not be met when Q mends=70% × Q rows.
From Figure 15-1 as can be seen that the boundary face that concentration is 0.01PPM search gas extends to left and right side in vent cabinet
Near.Now via opening 101 enter cabinet 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 overflowed outside opening 101
Risk.
Although in various embodiments of the present invention, wind-supplying mouth 302 is separated into outside wind-supplying mouth 311 and inner side by guide plate 310
Wind-supplying mouth 312, it will be appreciated by a person skilled in the art that wind-supplying mouth 302 can also be separated into by multiple guide plates 310 outside multiple
Side wind-supplying mouth 311 and multiple inner side wind-supplying mouths 312, therefore the present invention is to the quantity and inner side wind-supplying mouth 312 of guide plate 310 and outer
The quantity of side wind-supplying mouth 311 is not construed as limiting.
The vent cabinet that various embodiments of the present invention provide, broken in original industry to vent cabinet must all by mend wind or
Person must isolate the inner chamber of vent cabinet with external environment the understanding that can just prevent that pernicious gas overflows inside vent cabinet.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 the 1st
Phase:44-49) one it the article pointed out, " compensating ventilation cabinet laboratory hood then because 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 present invention provide, is not confined in original understanding to vent cabinet, creatively
The external environment benefit wind of vent cabinet is guided, the external air flow for making original be considered as interference closing, is changed into as passive
Benefit general mood stream is same actively to mend " beneficial " air-flow that general mood stream works and cooperated together.
The vent cabinet provided according to embodiments of the present invention, it is whole to eliminate all air draft air-flows being discharged to beyond vent cabinet
By the active supplemental air flow of air-makeup system or all by cabinet outside the potential safety hazard supplemented of passive supplemental air flow, by only existing
The lower section of the opening of cabinet 100 101 sets wind-supplying mouths 302, and control exhaust air rate, actively mends wind air quantity and passive benefit wind air quantity it is mutual it
Between ratio, make at the opening 101 of vent cabinet formed all the time towards the one-way gas flow of exhaust outlet in cabinet, thereby may be ensured that use
The safety of person, effectively prevent that pernicious gas overflows in cabinet.In addition, need essence during three wind-supplying mouths relative to setting in the prior art
The really air output of three wind-supplying mouths of control, once otherwise disequilibrium, effect and security with regard to lossy risk, the present invention by
In only set a wind-supplying mouth, relative to multiple wind-supplying mouths in structure it is more simple, production cost is lower, further increases safety
Coefficient.
Claims (24)
1. a kind of vent cabinet, including front side are provided with the cabinet of opening, it is characterised in that also include：
The exhaust outlet in cabinet is connected, the exhaust outlet is located at the top of cabinet side rearward；
Mend wind passage including wind-supplying mouth；And
The deflector of side rearward is stood in cabinet, the deflector includes substrate and rake, the substrate lower end and the cabinet
Space is left between body bottom, between the rake lower end and the substrate,
Wherein, the wind-supplying mouth is located at below the opening, and the rake is arranged to its front end and institute is covered when seeing from below
State exhaust outlet.
2. a kind of vent cabinet as claimed in claim 1, it is characterised in that in terms of front side, the exhaust outlet is centrally located at institute
State the centre of the left and right sides in cabinet；Side is seen from the left or right, and the exhaust outlet is centrally located in the cabinet side rearward.
3. a kind of vent cabinet as claimed in claim 1, it is characterised in that side is seen from the left or right, the centre bit of the exhaust outlet
At between front and rear side in the cabinet and away from rear side a quarter.
A kind of 4. vent cabinet as claimed in claim 1, it is characterised 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 extended to opening left and right ends and cover the opening.
A kind of 5. vent cabinet as claimed in claim 1, it is characterised in that side is seen from the left or right, the top side of the wind-supplying mouth and
Curved 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, it is characterised in that the arc is quadrant arc.
7. a kind of vent cabinet as claimed in claim 1, it is characterised in that the wind-supplying mouth outside and the cabinet front inner
In same perpendicular, the upward benefit general mood stream for making to send out through the wind-supplying mouth covers the opening of the cabinet.
8. a kind of vent cabinet as claimed in claim 1, it is characterised in that be provided with guide plate, the guiding in the wind-supplying mouth
The wind-supplying mouth is separated into the outside wind-supplying mouth pointed up and points to the inner side wind-supplying mouth in the cabinet by plate.
9. a kind of vent cabinet as claimed in claim 8, it is characterised in that the cross section of the guide plate is curved, for leading
The benefit wind airflow direction that inner side wind-supplying mouth described in tying-in is sent out.
10. a kind of vent cabinet as claimed in claim 8, it is characterised in that the guide plate lower end part leads in the benefit wind
In road, the bottom is used for distributing the benefit wind air quantity of the outside wind-supplying mouth and the inner side wind-supplying mouth.
11. a kind of vent cabinet as claimed in claim 1, it is characterised in that the deflector substrate is provided with through hole, described
Through hole is uniformly distributed along horizontal width direction, and its hole area is gradually reduced relative to the accounting of unit area from down to up.
A kind of 12. vent cabinet as claimed in claim 11, it is characterised 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, it is characterised in that in terms of front side, be arranged at 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, it is characterised in that the deflector substrate also includes deflector top
With deflector bottom, space is left between the deflector bottom and the deflector top.
15. a kind of vent cabinet as claimed in claim 1, it is characterised in that front side top is provided with hang plate in the cabinet；Institute
The upward bearing of trend of the hang plate bearing of trend shape upward with the rake is stated to have angle.
16. a kind of vent cabinet as claimed in claim 1, it is characterised in that also include the benefit wind connected with the mend wind passage
Blower fan, the benefit wind blower fan is adjustable power type blower fan.
17. a kind of vent cabinet as claimed in claim 16, it is characterised in that the benefit wind blower fan is located at the mend wind passage
It is interior.
A kind of 18. vent cabinet as claimed in claim 1, it is characterised in that also include the benefit air valve connected with mend wind passage,
The benefit air valve is aperture type variable valve.
19. a kind of vent cabinet as claimed in claim 1, it is characterised in that the vent cabinet side wall and/or lower wall are hollow knot
Structure, the mend wind passage are located at the side wall and/or lower wall of the cabinet.
20. a kind of vent cabinet as claimed in claim 1, it is characterised in that also 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
State in cabinet,
Wherein, the vent cabinet is arranged to 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, it is characterised in that the wind-supplying mouth lateral wall and sliding door outside
Wall is located in same perpendicular, and the upward benefit general mood stream for making to send out through the wind-supplying mouth is covered and opened described in the cabinet
Mouthful.
22. a kind of vent cabinet as claimed in claim 20, it is characterised in that also include：
Position sensor, for detecting the position of the sliding door；And
The control unit being connected with the position sensor,
Wherein, the guide plate also 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.
A kind of 23. control method of vent cabinet as claimed in claim 22, it is characterised in that including：
When it is 0%~4% that sliding door movement, which causes the opening aperture, the adjustable plate free end is set as and the benefit
Wind channel base plate contacts, that is, closes the outside wind-supplying mouth；
When the sliding door movement cause it is described opening aperture be 5%~60% when, the adjustable plate free end be set as with it is described
The distance of mend wind passage bottom plate is less than or equal to the 40% of the mend wind passage height；
When it is 61%~100% that sliding door movement, which causes the opening aperture, the adjustable plate free end is set as and institute
The distance for stating mend wind passage bottom plate is less than or equal to the 70% of the mend wind passage height.
24. the control method of a kind of vent cabinet as described in claim 1 or 22, it is characterised in that when the vent cabinet air draft
When, 40%~69% air-flow sent out by the wind-supplying mouth of exhaust air rate supplements.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710939219.1A CN107497815B (en) | 2017-10-11 | 2017-10-11 | Ventilation cabinet |
| PCT/CN2018/071359 WO2019071864A1 (en) | 2017-10-11 | 2018-01-04 | Fume hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710939219.1A CN107497815B (en) | 2017-10-11 | 2017-10-11 | Ventilation cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107497815A true CN107497815A (en) | 2017-12-22 |
| CN107497815B CN107497815B (en) | 2020-08-07 |
Family
ID=60701396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710939219.1A Active CN107497815B (en) | 2017-10-11 | 2017-10-11 | Ventilation cabinet |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107497815B (en) |
| WO (1) | WO2019071864A1 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108160651A (en) * | 2017-12-30 | 2018-06-15 | 江苏科泰检测技术服务有限公司 | Metal detection Environmental-protective ventilating cabinet |
| CN108405544A (en) * | 2018-05-10 | 2018-08-17 | 北京天辰昊桦科技有限公司 | A kind of device of purification run area pollutant |
| WO2019071864A1 (en) * | 2017-10-11 | 2019-04-18 | 倚世节能科技（上海）有限公司 | Fume hood |
| CN109654830A (en) * | 2018-12-28 | 2019-04-19 | 天津森罗科技股份有限公司 | A kind of medicinal material drying processing unit |
| CN110201964A (en) * | 2019-06-24 | 2019-09-06 | 北京成威博瑞实验室设备有限公司 | Laboratory hood |
| CN110493986A (en) * | 2019-08-02 | 2019-11-22 | 联想(北京)有限公司 | A kind of cabinet |
| CN112710054A (en) * | 2021-01-29 | 2021-04-27 | 广东天赐湾实验室装备制造有限公司 | Fume hood capable of forced downward air supply |
| CN113385514A (en) * | 2021-07-21 | 2021-09-14 | 青岛中科汉维实验室装备科技有限公司 | Air supplementing type exhaust cabinet |
| CN113414209A (en) * | 2021-07-19 | 2021-09-21 | 青岛中科汉维实验室装备科技有限公司 | Air supplement type laboratory ventilation cabinet |
| CN113566254A (en) * | 2021-08-05 | 2021-10-29 | 同济大学 | Residential kitchen air supplementing method and air supplementing integrated range hood |
| CN113578908A (en) * | 2021-08-02 | 2021-11-02 | 深圳市嘉鸿顺实业有限公司 | Ventilation cabinet |
| CN114453375A (en) * | 2020-11-09 | 2022-05-10 | 实验室融合有限责任公司 | Air volume adjustable type fume hood equipment |
| CN115007590A (en) * | 2022-06-17 | 2022-09-06 | 倚世节能科技（上海）有限公司 | Ventilation cabinet |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4177718A (en) * | 1978-07-27 | 1979-12-11 | American Hospital Supply Corporation | Fume hood |
| WO2001087506A1 (en) * | 2000-05-18 | 2001-11-22 | The Regents Of The University Of California | Low flow fume hood |
| CN202356386U (en) * | 2011-12-13 | 2012-08-01 | 深圳市威尔迅驰科技有限公司 | Energy-saving ventilation cabinet with centered air supplement |
| CN103272818A (en) * | 2013-06-05 | 2013-09-04 | 广州穗剑实验室科技有限公司 | Novel energy-saving environment-friendly numerical-control fume hood of laboratory |
| CN205732220U (en) * | 2016-01-11 | 2016-11-30 | 上海锐石工程技术有限公司 | A kind of ventilated chamber |
| CN107202415A (en) * | 2016-03-17 | 2017-09-26 | 倚世节能科技（上海）有限公司 | A kind of ventilation equipment of current-stabilizing structure and the application current-stabilizing structure |
| CN207463783U (en) * | 2017-10-11 | 2018-06-08 | 倚世节能科技（上海）有限公司 | Vent cabinet |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9808575D0 (en) * | 1998-04-23 | 1998-06-24 | Pse Engineering Limited | Improvements in fume cupboards |
| CN2660379Y (en) * | 2003-08-07 | 2004-12-01 | 潘劲风 | Environmental protection balancing, compensating ventilation cabinet |
| CA2632195C (en) * | 2005-10-14 | 2014-02-18 | Flowsafe, Inc. | Converting existing prior art fume hoods into high performance low airflow stable vortex fume hoods |
| CN107497815B (en) * | 2017-10-11 | 2020-08-07 | 倚世节能科技（上海）有限公司 | Ventilation cabinet |
-
2017
- 2017-10-11 CN CN201710939219.1A patent/CN107497815B/en active Active
-
2018
- 2018-01-04 WO PCT/CN2018/071359 patent/WO2019071864A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4177718A (en) * | 1978-07-27 | 1979-12-11 | American Hospital Supply Corporation | Fume hood |
| WO2001087506A1 (en) * | 2000-05-18 | 2001-11-22 | The Regents Of The University Of California | Low flow fume hood |
| CN202356386U (en) * | 2011-12-13 | 2012-08-01 | 深圳市威尔迅驰科技有限公司 | Energy-saving ventilation cabinet with centered air supplement |
| CN103272818A (en) * | 2013-06-05 | 2013-09-04 | 广州穗剑实验室科技有限公司 | Novel energy-saving environment-friendly numerical-control fume hood of laboratory |
| CN205732220U (en) * | 2016-01-11 | 2016-11-30 | 上海锐石工程技术有限公司 | A kind of ventilated chamber |
| CN107202415A (en) * | 2016-03-17 | 2017-09-26 | 倚世节能科技（上海）有限公司 | A kind of ventilation equipment of current-stabilizing structure and the application current-stabilizing structure |
| CN207463783U (en) * | 2017-10-11 | 2018-06-08 | 倚世节能科技（上海）有限公司 | Vent cabinet |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019071864A1 (en) * | 2017-10-11 | 2019-04-18 | 倚世节能科技（上海）有限公司 | Fume hood |
| CN108160651A (en) * | 2017-12-30 | 2018-06-15 | 江苏科泰检测技术服务有限公司 | Metal detection Environmental-protective ventilating cabinet |
| CN108160651B (en) * | 2017-12-30 | 2023-08-25 | 江苏科泰检测技术服务有限公司 | Environment-friendly fume chamber for metal detection |
| CN108405544A (en) * | 2018-05-10 | 2018-08-17 | 北京天辰昊桦科技有限公司 | A kind of device of purification run area pollutant |
| CN109654830A (en) * | 2018-12-28 | 2019-04-19 | 天津森罗科技股份有限公司 | A kind of medicinal material drying processing unit |
| CN110201964A (en) * | 2019-06-24 | 2019-09-06 | 北京成威博瑞实验室设备有限公司 | Laboratory hood |
| CN110201964B (en) * | 2019-06-24 | 2024-05-10 | 北京成威博瑞实验室设备有限公司 | Laboratory fume hood |
| CN110493986A (en) * | 2019-08-02 | 2019-11-22 | 联想(北京)有限公司 | A kind of cabinet |
| CN114453375A (en) * | 2020-11-09 | 2022-05-10 | 实验室融合有限责任公司 | Air volume adjustable type fume hood equipment |
| CN112710054A (en) * | 2021-01-29 | 2021-04-27 | 广东天赐湾实验室装备制造有限公司 | Fume hood capable of forced downward air supply |
| CN113414209A (en) * | 2021-07-19 | 2021-09-21 | 青岛中科汉维实验室装备科技有限公司 | Air supplement type laboratory ventilation cabinet |
| CN113385514A (en) * | 2021-07-21 | 2021-09-14 | 青岛中科汉维实验室装备科技有限公司 | Air supplementing type exhaust cabinet |
| CN113578908A (en) * | 2021-08-02 | 2021-11-02 | 深圳市嘉鸿顺实业有限公司 | Ventilation cabinet |
| CN113566254A (en) * | 2021-08-05 | 2021-10-29 | 同济大学 | Residential kitchen air supplementing method and air supplementing integrated range hood |
| CN115007590A (en) * | 2022-06-17 | 2022-09-06 | 倚世节能科技（上海）有限公司 | Ventilation cabinet |
| CN115007590B (en) * | 2022-06-17 | 2023-11-10 | 倚世节能科技（上海）有限公司 | Fume chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019071864A1 (en) | 2019-04-18 |
| CN107497815B (en) | 2020-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107497815A (en) | Vent cabinet | |
| WO2016161834A1 (en) | Ventilating cabinet | |
| CN106140769B (en) | Ventilation cabinet | |
| US7217183B2 (en) | Turbulence-free laboratory safety enclosure | |
| CN205536442U (en) | Ventilation equipment of stationary flow structure and applied this stationary flow structure | |
| JP2019508651A (en) | Ventilation system having steady flow structure and steady flow structure | |
| CN105674360A (en) | Range hood | |
| CN104689652B (en) | Sack cleaner air intake flow field adjusting apparatus | |
| CN207463783U (en) | Vent cabinet | |
| CN217941291U (en) | Upper air supplementing module and ventilation cabinet | |
| CN101825391B (en) | Device for drying hydrous waste plastic | |
| CN108361220A (en) | A kind of open type air eddy side intake and blowing device | |
| JP6278532B2 (en) | Weighing system | |
| CN207247452U (en) | A kind of air passage ventilating system applied to stalk vault piping lane | |
| CN217857912U (en) | Ventilation cabinet | |
| CN217726586U (en) | Flow guide structure and fume chamber | |
| CN207196802U (en) | A kind of ventilation equipment | |
| CN206689173U (en) | A kind of intelligent vent cabinet | |
| CN115318786A (en) | Ventilation cabinet | |
| JP2014016072A (en) | Air cleaner | |
| CN206794323U (en) | The special vent cabinet in research laboratory | |
| CN205128574U (en) | Deflector of ventilation hood | |
| CN201364004Y (en) | Drying device of water-bearing waste plastic | |
| JP4704284B2 (en) | Air curtain type air tank | |
| KR100686770B1 (en) | Discharging port of ventilating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Fume hood Effective date of registration: 20220616 Granted publication date: 20200807 Pledgee: China Minsheng Banking Corp Shanghai branch Pledgor: E3 GREEN TECHNOLOGY Co.,Ltd. Registration number: Y2022310000061 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230731 Granted publication date: 20200807 Pledgee: China Minsheng Banking Corp Shanghai branch Pledgor: E3 GREEN TECHNOLOGY Co.,Ltd. Registration number: Y2022310000061 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Ventilation cabinet Effective date of registration: 20230804 Granted publication date: 20200807 Pledgee: China Minsheng Banking Corp Shanghai branch Pledgor: E3 GREEN TECHNOLOGY Co.,Ltd. Registration number: Y2023310000435 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |