CN216880947U

CN216880947U - Air supplementing exhaust cabinet

Info

Publication number: CN216880947U
Application number: CN202220160101.5U
Authority: CN
Inventors: 许胜锋
Original assignee: Shanghai Weilan Energy Saving Technology Co ltd
Current assignee: Shanghai Weilan Energy Saving Technology Co ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-07-05
Anticipated expiration: 2032-01-20

Abstract

The utility model discloses an air supplementing exhaust cabinet, which comprises an exhaust cabinet main body and a visual window, wherein a cavity with an opening at the front side is formed in the exhaust cabinet main body, a workbench is arranged at the lower part of the cavity, a static pressure box capable of supplying air into the cavity is arranged at the bottom of the workbench, a top plate is arranged at the top of the exhaust cabinet main body, side plates are arranged at two sides of the exhaust cabinet main body, and the front ends of the side plates are connected with a stand column structure; the exhaust cabinet main body also comprises an air wing structure which is arranged at the front lower part of the chamber and is connected with the static pressure box; the static pressure box comprises a first air supply channel and a second air supply channel; the air wing structure is provided with an air inlet and an air outlet, the air inlet is communicated with the first air supply channel, and the air outlet is communicated with the cavity; the upright post structure comprises an upright post inner cavity, and an air supplementing groove is formed in the side, close to the cavity, of the upright post structure; the second air supply channel is communicated with the inner cavity of the upright post, and the inner cavity of the upright post is communicated with the air supplementing groove. Therefore, the air supplementing effect is improved, the stability of air flow in the exhaust cabinet is ensured, a high-power fan is not needed, and the energy consumption can be reduced.

Description

Air supplementing exhaust cabinet

Technical Field

The utility model relates to the technical field of laboratory exhaust equipment, in particular to an air supplementing exhaust cabinet.

Background

The statements herein merely provide background related to the present disclosure and may not necessarily constitute prior art.

Laboratory ventilation is an integral part of laboratory design. In order for laboratory workers not to inhale or swallow some toxic, pathogenic or non-toxic chemicals and organisms, good ventilation should be provided in the laboratory. To prevent the absorption of some vapors, gases and particulates (smoke, soot, dust and aerosols), the contaminants must be removed by hood, hood or local ventilation.

The exhaust cabinet is one of the most commonly used local exhaust equipments in the laboratory, and generally speaking, the exhaust device is installed on the top of the exhaust cabinet, so as to exhaust the toxic and harmful gases out of the room. The side surface of the exhaust cabinet facing the operator is provided with a visual window which slides up and down. When the multifunctional visual window is used, the visual window is pulled down to leave a certain space with a workbench in the exhaust cabinet, and an operator can operate on the workbench. At the moment when the operator opens the visual window, the external air enters the exhaust cabinet to interfere the air in the exhaust cabinet, so that the disordered part of the air flow in the exhaust cabinet overflows.

Therefore, there is a need for an exhaust cabinet with air supplement function, which overcomes the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects in the prior art, the utility model provides an air supplementing exhaust cabinet.

The technical scheme of the utility model is as follows:

the utility model provides an air supplementing exhaust cabinet, which comprises an exhaust cabinet main body and a visible window connected with the exhaust cabinet main body, wherein a cavity with an opening at the front side is formed in the exhaust cabinet main body, a workbench is arranged at the lower part of the cavity, a static pressure box capable of supplying air into the cavity is arranged at the bottom of the workbench, a top plate is arranged at the top of the exhaust cabinet main body, side plates are arranged at two sides of the exhaust cabinet main body, and the front ends of the side plates are connected with a stand column structure; the exhaust cabinet main body also comprises an air wing structure which is arranged at the front lower part of the chamber and is connected with the static pressure box;

the static pressure box comprises a first air supply channel and a second air supply channel;

the air wing structure is provided with an air inlet and an air outlet, the air inlet is communicated with the first air supply channel, and the air outlet is communicated with the cavity;

the vertical column structure comprises a vertical column inner cavity, the vertical column structure is close to the cavity side, and an air supplementing groove is formed in the cavity side, wherein the second air supply channel is communicated with the vertical column inner cavity, and the vertical column inner cavity is communicated with the air supplementing groove.

Further, the airfoil structure includes:

the air wing arc plate is arranged at the front part, and the arc of the air wing arc plate protrudes to the front part;

the air wing side plate is arranged at the rear part and is vertically arranged, the upper part of the air wing side plate is provided with the air outlet, and the lower part of the air wing side plate is provided with the air inlet;

the air wing bottom plate is arranged at the bottom and is horizontally arranged;

the airfoil cavity is enclosed by the airfoil circular arc plate, the airfoil side plate and the airfoil bottom plate; and

the inner air deflector is arranged in the airfoil cavity, one end of the inner air deflector is positioned at the joint of the airfoil side plate and the airfoil bottom plate, and the other end of the inner air deflector is positioned on the inner wall of the airfoil arc plate, so that the airfoil cavity is divided into an airfoil first cavity and an airfoil second cavity from front to back;

the air in the first air supply channel of the static pressure box enters the second cavity of the air wing from the air inlet and is discharged into the cavity from the air outlet through the guide of the inner air deflector.

Furthermore, the total area of the air inlet is 4-6 times of the total area of the air outlet.

Furthermore, the included angle theta between the air wing side plate and the inner air deflector is set to be 20-70 degrees.

Furthermore, a bearing plate extends backwards from the airfoil bottom plate, and the static pressure box is detachably connected to the bearing plate; the air wing arc plate extends backwards to form a guide plate.

Further, the upright post structure comprises an upright post body, and an upright post first cavity is defined by the front end inside the upright post structure; the upright post body comprises an upright post outer side wall arranged at the left end, an upright post inclined wall arranged at the front end and forming an acute angle with the upright post outer side wall, an upright post inner side wall arranged at the right end and an upright post rear side wall arranged at the rear end, wherein the air supplementing groove is arranged between the upright post inner side wall and the upright post inclined wall and is a vertical through groove;

the vertical through groove is provided with an upright column inclined wall arranged on the right side of the inner side wall of the upright column; the vertical through groove is communicated with the first cavity of the upright post;

and air in the second air supply channel of the static pressure box enters the first cavity of the upright post and is discharged through the vertical through groove.

Further, the width of the vertical through groove is less than or equal to 1/5 times of the width of the first cavity of the upright post.

Furthermore, the setting range of an included angle beta between the inclined wall of the upright post and the outer side wall of the upright post is 20-70 degrees.

Furthermore, at least one first air supply channel is arranged, and the second air supply channels are arranged on two sides of the static pressure box and close to the side plates; the tails of the first air supply channel and the second air supply channel are provided with a plurality of groups of fans.

Further, the first air supply channel is of a structure with a large front part and a small back part; the second air supply channel is of a structure with a small front part and a big rear part; and a connecting pipe for communicating is arranged between the first air supply channel and the upright post.

The utility model achieves the following beneficial effects:

according to the air supplementing exhaust cabinet, the air wing structure, the static pressure box and the upright post structure are combined, the structural design of the exhaust cabinet is optimized, the air flow improves the air supplementing effect, the air flow in the exhaust cabinet is ensured to be stable, the harmful gas discharge efficiency is improved, and under the condition of reducing the face wind speed, the air supplementing effect is increased on the basis of the traditional exhaust cabinet, the anti-interference capability is enhanced, and the harmful gas is ensured not to leak and escape; and the traditional high-power fan is not needed, so that the aim of reducing energy consumption is fulfilled.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic side sectional view of the present invention.

FIG. 3 is a schematic view of the main view structure of the present invention (omitting the visible window).

FIG. 4 is a schematic cross-sectional view of an airfoil configuration of the present invention.

FIG. 5 is a schematic view of an airfoil configuration according to a certain aspect of the present invention.

FIG. 6 is a schematic view of the air flow of the airfoil configuration of the present invention.

Fig. 7 is a schematic sectional view of the pillar structure of the present invention.

Fig. 8 is a schematic structural diagram of a pillar structure according to a certain view of the present invention.

Figure 9 is a schematic view of the air flow of the column structure of the present invention.

Fig. 10 is a partially exploded view of the structure of the plenum box of the present invention.

Fig. 11 is a partially enlarged view taken at point i in fig. 10.

FIG. 12 is a schematic flow diagram of the air flow of the plenum of the present invention.

FIG. 13 is a schematic view of the assembly of the airfoil structure, plenum box, table and column structure according to one embodiment of the utility model.

Fig. 14 is a partially enlarged view of the point ii in fig. 13.

In the figure, 1, a main body of the exhaust cabinet; 2. a visual window; 21. an upper section bar; 22. a lower section bar; 3. a chamber; 4. An air exhaust device; 5. a storage cabinet; 100. a work table; 200. a static pressure box; 210. a first air supply passage; 220. A second air supply passage; 230. a hydrostatic tank housing; 231. a cover plate; 232. a lower housing; 2321. a first vent slot; 2322. a second vent groove; 240. a partition plate; 250. a fan; 300. a top plate; 400. a side plate; 500. a column structure; 510. air supply duct; 511. a vertical through groove; 512. a column first chamber; 520. The outer side wall of the upright post; 530. an upright column inclined wall; 531. a first wind compensation wing; 540. the inner side wall of the upright post; 541. A second wind compensation wing; 542. a second chute; 550. a rear sidewall; 551. a first chute; 560. a column second chamber; 570. a connecting pipe; 580. a column cover; 581. a wind scooper; 600. an airfoil structure; 610. an airfoil arc plate; 620. an airfoil side panel; 621. an air inlet; 6211. a first hole; 622. an air outlet; 6221. A second hole; 630. an airfoil baseplate; 640. an airfoil chamber; 641. an airfoil first chamber; 642. an airfoil second chamber; 650. an inner air deflector; 660. a carrier plate; 670. a baffle; 680. a wing cover; 700. A back plate; 800. an air exhaust and guide component; 810. a first air deflector; 820. a second air deflector; 830. a third air deflector; 831. a socket; 832. a sink device; 840. and fixing the flow guide clamp.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present application, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

It should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

To facilitate understanding of the present invention for those skilled in the art, a specific embodiment of the present invention will be described below with reference to fig. 1 to 14.

As shown in fig. 1 to 3, the present invention provides an air supply exhaust cabinet, which comprises an exhaust cabinet main body 1 and a visible window 2 connected with the exhaust cabinet main body 1, wherein a chamber 3 with a front opening is formed inside the exhaust cabinet main body 1, a workbench 100 is arranged at the lower part of the chamber 3, a plenum chamber 200 capable of supplying air into the chamber 3 is arranged at the bottom of the workbench 100, a top plate 300 is arranged at the top of the exhaust cabinet main body 1, side plates 400 are arranged at two sides of the exhaust cabinet main body 1, and the front ends of the side plates 400 are connected with a column structure 500; the exhaust cabinet main body 1 further comprises an airfoil structure 600, wherein the airfoil structure 600 is arranged at the front lower part of the chamber 3 and is connected with the plenum box 200;

the plenum box 200 includes a first air supply passage 210 and a second air supply passage 220;

the airfoil structure 600 is provided with an air inlet 621 and an air outlet 622, the air inlet 621 is communicated with the first air supply channel 210, and the air outlet 622 is communicated with the chamber 3;

the stand structure 500 comprises a stand inner cavity, the stand structure 500 is provided with an air supplementing groove near the 3 side of the cavity, wherein the second air supply channel 220 is communicated with the stand inner cavity, and the stand inner cavity is communicated with the air supplementing groove.

The upright column structure 500 is combined with the air wing structure 600, the static pressure box 200 and the exhaust device arranged on the exhaust cabinet, so that the gas in the cabinet is prevented from overflowing more effectively.

As shown in fig. 2, the exhaust cabinet further includes an exhaust wind guide assembly 800 disposed at the rear portion of the chamber 3, the exhaust wind guide assembly 800 is fixed on the top plate 300 and the back plate 700 by a fixing guide clamp 840, and a gap exists between the bottom of the exhaust wind guide assembly 800 and the workbench 100. There is a distance between the air exhaust and guide assembly 800 and the back plate 700.

The exhaust air guide assembly 800 sequentially comprises a first air deflector 810, a second air deflector 820 and a third air deflector 830 from top to bottom, a distance exists between the second air deflector 820 and the third air deflector 830, and a distance exists between the third air deflector 830 and the workbench 100.

In order to satisfy various experiments in the exhaust hood, the third air guiding plate 830 is provided with a socket 831 and/or a water tank device 832 for receiving water. As shown in fig. 3, the plurality of sockets 831 can be used to connect various power-on instruments or detection devices; this basin device 832 includes water pipe and basin, can be used to wash medicine bottle or reagent bottle, and the operator can accomplish in the cabinet of airing exhaust, more accords with actual need, and is more humanized, has promoted user's use and has felt.

The air outlet of the air exhausting device 4 is disposed between the top plate 300 and the first air deflector 810. In this embodiment, the fixed diversion clamp 840 is fixed with the back plate 700 by screws, and the fixed diversion clamp 840 is a plurality of and can be uniformly arranged.

As shown in figure 1, the lower part of the exhaust cabinet is also provided with a storage cabinet 5 for placing articles.

As shown in fig. 1 and 2, one side of each of an upper section bar 21 and a lower section bar 22 of the viewing window 2 is provided with an arc structure, the arc structure of the upper section bar 21 is arranged on one side close to the chamber 3 and protrudes into the chamber 3, and the arc structure of the lower section bar 22 is arranged on one side far from the chamber 3 and protrudes outward; the arc-shaped structure is in streamline design and has guidance quality, gas is prevented from overflowing, and air supplement is facilitated.

Specifically, as shown in FIGS. 4-6, airfoil structure 600 includes:

an airfoil circular arc plate 610 disposed at the front, the circular arc of the airfoil circular arc plate 610 protruding toward the front; an airfoil side plate 620 arranged at the rear part, wherein the airfoil side plate 620 is vertically arranged, the upper part of the airfoil side plate 620 is provided with an air outlet 622, and the lower part is provided with an air inlet 621; an airfoil floor 630 disposed at the bottom, the airfoil floor 630 being disposed horizontally; an airfoil chamber 640 bounded by an airfoil circular arc plate 610, an airfoil side plate 620, and an airfoil bottom plate 630; the inner air deflector 650 is arranged in the airfoil cavity 640, one end of the inner air deflector is positioned at the joint of the airfoil side plate 620 and the airfoil bottom plate 630, and the other end of the inner air deflector is positioned on the inner wall of the airfoil circular arc plate 610, so that the airfoil cavity 640 is divided into an airfoil first cavity 641 and an airfoil second cavity 642 from front to back;

the wind blowing from the first wind channel 210 of the plenum box 200 enters the second airfoil chamber 642 from the wind inlet 621, is guided by the inner wind deflector 650, and is discharged from the wind outlet 622.

The wind in the static pressure box 200 passes through the airfoil structure 600, converts partial dynamic pressure into static pressure, reduces the speed, and enables the wind speed of the wind outlet 622 to be uniformly blown into the exhaust cabinet, thereby being more beneficial to ensuring the stable wind speed in the exhaust cabinet.

The arc of aerofoil arc plate 610 is convex to the front, and such streamlined design has the water conservancy diversion effect, can make the outside wind that is located the cabinet front end of airing exhaust more smoothly get into the cabinet of airing exhaust, and supplementary air current mends the wind.

The inner air deflection plates 650, the airfoil side plates 620, and the airfoil bottom plate 630 enclose an airfoil second chamber 642. This interior aviation baffle 650 has two effects, and one is that the wind speed that gets into in the air intake 621 is great, and the aviation baffle plays the gentle wind effect to the wind speed, reduces the wind speed, and its two is because interior aviation baffle 650 inclined plane sets up, plays the guide effect to the wind direction, more is favorable to airing exhaust of air outlet 622 and does benefit to that the wind speed is even.

In order to further ensure the air flow air supplement effect, the total area of the air inlet 621 is 4-6 times of the total area of the air outlet 622.

In this embodiment, the air inlet 621 is configured as a plurality of first holes 6211 of the air wings which are uniformly distributed in the transverse direction, and the air outlet 622 is configured as a plurality of second holes 6221 of the air wings which are uniformly distributed in the transverse direction.

As shown in fig. 5, the first airfoil 6211 is a horizontally disposed elongated hole, the second airfoil 6221 is a horizontally disposed rectangular slot, and the number of the first airfoil 6211 and the second airfoil 6221 is set according to the size, the air volume, and other parameters, which is not limited to the present invention.

The included angle theta between the air wing side plate 620 and the inner air deflector 650 is set to be 20-70 degrees, so that the air flow air supplementing effect can be enhanced.

In this embodiment, the angle θ between the airfoil side plate 620 and the inner air deflector 650 is preferably 45 °.

In order to make the assembly of the airfoil structure 600 with the plenum box 200 more secure, the airfoil floor 630 is extended rearwardly with a carrier plate 660 against which the bottom of the plenum box 200 abuts.

The airfoil arc plate 610 extends backward to form a guide plate 670, and when wind is discharged from the air outlet 622, the guide plate 670 can guide the wind direction.

The airfoil structure 600 is an integrally formed structure, and may be made of aluminum alloy or other materials, which is not limited in the present invention.

In order to ensure that the airflow does not leak from the left and right sides of the airfoil structure 600, the airfoil covers 680 are mounted at the left and right ends of the airfoil structure 600, and the mounting manner may be a snap connection or a screw connection, and the mounting manner is not limited herein.

It should be noted that the arrows in fig. 2, 6, 9, 12, and 13 are directed in the direction of the wind or the airflow.

The operation of the airfoil structure 600:

as shown in fig. 4 to 6, the wind passing through the airfoil structure 600 enters the exhaust cabinet from two positions, the front end enters the exhaust cabinet along the airfoil arc plate 610, the rear end enters the second cavity 642 of the airfoil through the wind inlet 621, the wind is reflected by the inner wind deflector 650 to be guided and decelerated, and the wind is discharged from the wind outlet 622 and enters the cavity 3 of the exhaust cabinet along the guide plate 670.

It should be noted that the upright structure 500 of the exhaust cabinet is a left upright and a right upright, which are mirror images of each other, and the left upright (the upright structure 500 for short) is used as an example to describe specific structures and connection relationships, which is not described in detail herein.

Specifically, as shown in fig. 7 to 9, the pillar structure 500 includes:

including vertical stand body, inside by preceding to enclose in proper order after and have become stand first cavity 512 and stand second cavity 560, separate with the crossbeam that sets up between stand lateral wall 520 and stand inside wall 540 between stand first cavity 512 and the stand second cavity 560. Of course, the number of chambers 3 of the column is not limited thereto, and may be three chambers 3, and the specific number of chambers 3 is not limited in the present invention.

The upright body comprises an upright outer wall 520 arranged at the left end, an upright inclined wall 530 arranged at the front end and integrally connected with the upright outer wall 520, an upright inner wall 540 arranged at the right end and an upright rear wall 550 arranged at the rear end, wherein a vertical through groove 511 is formed between the upright inner wall 540 and the upright inclined wall 530; at the vertical through groove 511, the pillar inclined wall 530 is arranged at the right side of the pillar inner side wall 540; the vertical through groove 511 is communicated with the first upright post chamber 512, and the vertical through groove 511 and the first upright post chamber 512 form an air supplementing duct 510. The air in the second air supply channel 220 of the static pressure box 200 enters the air supplementing air duct 510, so that the air supplementing effect can be achieved, especially when an operator stands in front of the exhaust cabinet when the exhaust cabinet is used, the operator stretches his hand to enter the interior of the exhaust cabinet for experimental operation or to observe the interior of the exhaust cabinet, the rotating air flow entering the exhaust cabinet can be effectively reduced, the upright column structure 500 is combined with the air wing structure 600, the static pressure box 200 and the exhaust device arranged on the exhaust cabinet for use, and the gas in the cabinet is effectively prevented from overflowing.

As shown in fig. 7, the width of the vertical through slot 511 is set to L1, and the width of the pillar first chamber 512 is set to L2. In order to ensure the air supplementing effect of the air supplementing air duct 510, L1 is less than or equal to (1/5) and L2.

A first wind-supplementing wing 531 extends backward from the inclined wall 530, so as to provide a guiding function for the airflow.

The inner sidewall 540 of the upright post extends forward along the inclined wall 530 of the upright post to form a second air supplement wing 541, which can guide the airflow.

Further, the distance between the first wind compensation wing 531 and the inner sidewall 540 of the upright is equal to the distance between the second wind compensation wing 541 and the inclined wall 530 of the upright, so that the guiding effect on the airflow is better.

As shown in fig. 7, the included angle β between the inclined wall 530 and the outer wall 520 is an acute angle, so that the air flow can be guided to the inside of the exhaust hood to make it easier to supplement air. The setting range of the included angle beta is 20-70 degrees.

In order to ensure the air supplementing effect of the air supplementing duct 510, an upright cover 580 is installed at the bottom of the upright structure 500, specifically, at the bottom of the upright first chamber 512, for bottom sealing, so as to prevent a portion of air from flowing out from the bottom of the upright first chamber 512, and the upright cover 580 and the upright structure 500 may be installed in a manner of being connected by a snap or a screw, and the installation manner is not limited herein. An integrated wind guide cover 581 is further arranged on the upright post cover 580, after the upright post cover 580 is installed with the upright post first chamber 512, the wind guide cover 581 is located in the upright post first chamber 512, and the guide cover is of a semi-open arc structure and faces the direction of the incoming wind.

In this embodiment, the angle β between the pillar inclined wall 530 and the pillar outer side wall 520 is set to 30 °.

As shown in FIG. 7, the pillar inclined wall 530 and the pillar outer sidewall 520 are connected by a circular arc transition, so that the connection is streamlined, and the wind compensation of the pillar inclined wall 530 is facilitated.

In this embodiment, the rear side wall 550 of the upright post is provided with a first sliding groove 551, the first sliding groove 551 is used for installing the side plate 400 of the exhaust cabinet, and the structure of the first sliding groove 551 is matched with the end structure of the side plate 400 connected with the first sliding groove 551. During installation, the side plate 400 is inserted into the first groove, and installation is simple, convenient and quick.

In this embodiment, the column inner side plate 400 is provided with a second sliding groove 542, and the second sliding groove 542 is used for installing the visible window 2 of the exhaust cabinet, and is longitudinally arranged, and the specific structure is an arc shape. According to the different leak protection grades of exhaust cabinet, still reserved a second spout 542 on the side stand, be convenient for install double glazing.

The working process of the column structure 500 is as follows:

as shown in fig. 8 and 9, in the process of entering the exhaust cabinet, a part of the air enters from the front of the exhaust cabinet along the inclined wall 530 of the upright post, and the other part of the air enters through the air supplement duct 510, so that when a rotating airflow occurs in front of the exhaust cabinet, air can be supplemented through the upright post structure 500, and the nonuniformity of the air flow field is reduced.

The utility model discloses a to stand structure 500 optimization, the effect of reinforcing benefit wind for the speed of the cabinet air removal of airing exhaust, further increased the whole effect of mending wind of the cabinet of airing exhaust, improved the performance of the cabinet of airing exhaust.

Specifically, as shown in fig. 10 to 12, the plenum box 200 includes:

the plenum box includes a plenum box case 230 in which the plenum box 200 is divided into a plurality of air supply passages by partitions 240, and the air supply passages are divided into a first air supply passage 210 and a second air supply passage 220. The static pressure case casing 230 has a first ventilating slot 2321 and a second ventilating slot 2322 formed at the front end thereof, and has a mounting slot for mounting the fan 250 formed at the rear end thereof. The tail part of each air supply channel is provided with a plurality of fans 250, and the fans 250 are air supply fans 250 and supply air from back to front.

The front end surface of the static pressure box 200 is attached to the airfoil side plate 620 of the airfoil structure 600, and the position of the first ventilation groove 2321 formed in the front end of the static pressure box 200 corresponds to the position of the air inlet 621, so that the wind can smoothly enter the airfoil structure 600 from the static pressure box 200.

The first ventilation slot 2321 is used in cooperation with the first air supply channel 210, the fan 250 supplies air, and air of the first air supply channel 210 is blown out through the first ventilation slot 2321, enters the airfoil structure 600 through the air inlet 621, and is discharged from the air outlet 622 into the chamber 3.

The second ventilating grooves 2322 are provided at both ends of the front end surface of the plenum box 200 for communicating with the columns.

The number of the first blowing passages 210 is at least one.

As shown in fig. 10 and 11, in this embodiment, the plenum housing 230 includes a lower housing 232 and a cover plate 231, which may be bolted or riveted or welded together. The front end of the lower housing 232 is opened with a first ventilation slot 2321 and second ventilation slots 2322 disposed at both ends of the first ventilation slot 2321. The first blowing passages 210 are two in number and both communicate with the airfoil structure 600. The number of the second blowing passages 220 is two, and the second blowing passages are respectively provided at both sides of the plenum box 200 near the side plates 400. The second air supply passage 220 of each side is respectively communicated with the upright post structures 500 of the same side.

As shown in fig. 13, in order to ensure the effect of the communication, a connection pipe 570 is provided between the pillar structure 500 and the second air blowing passage 220, and the connection pipe 570 is provided in the pillar structure 500, and has one end communicating with the second air blowing passage 220 and the other end communicating with the pillar first chamber 512.

As shown in fig. 13, the first blowing passage 210 is configured to have a large front and a small rear, so that the wind entering the airfoil structure 600 becomes more moderate and uniform; the second air supply channel 220 is arranged in a structure with a small front part and a large rear part, so that the air speed is increased, and more air enters the first cavity 512 of the upright post. Due to the structural arrangement, the wind supplementing wind speeds at the airfoil structure 600 and the upright post structure 500 are more uniform and consistent, and the actual requirements are better met.

As shown in fig. 2, the operation process of the exhaust hood is as follows:

when an operator performs an experiment in the exhaust cabinet, one part of air is blown into the airfoil structure 600 through the first air supply channel 210 of the plenum box 200 and then blown into the chamber 3 through the air outlet 622, and the other part of air is blown into the column structure 500 through the second air supply channel 220 of the plenum box 200 and then blown into the chamber 3 through the vertical through groove 511; meanwhile, air in the laboratory enters the chamber 3 through the upright column inclined wall 530 of the exhaust cabinet, and the air in the laboratory also enters the chamber 3 through the upper section bar 21 and the lower section bar 22 of the visible window 2; the above structures all supply air to the cavity 3 of the exhaust cabinet, and the airflow in the cavity 3 flows along the direction from the exhaust air guide assembly 800 to the exhaust device 4, so that the airflow in the cavity 3 is kept stable, the harmful gas exhaust efficiency is improved, and under the condition of reducing the face wind speed, the air supply effect is increased on the basis of the traditional exhaust cabinet, the anti-interference capability is enhanced, and the harmful gas is ensured not to leak and escape; and the traditional high-power fan is not needed, so that the aim of reducing energy consumption is fulfilled.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a cabinet of airing exhaust which characterized in that: the exhaust hood comprises an exhaust hood body (1) and a visual window (2) connected with the exhaust hood body (1), wherein a cavity (3) with a front opening is formed in the exhaust hood body (1), a workbench (100) is arranged at the lower part of the cavity (3), a static pressure box (200) capable of supplying air into the cavity (3) is arranged at the bottom of the workbench (100), a top plate (300) is arranged at the top of the exhaust hood body (1), side plates (400) are arranged on two sides of the exhaust hood body (1), and the front ends of the side plates (400) are connected with a stand column structure (500); the exhaust cabinet main body (1) further comprises an air wing structure (600), and the air wing structure (600) is arranged at the front lower part of the chamber (3) and is connected with the static pressure box (200);

the plenum box (200) comprises a first air supply channel (210) and a second air supply channel (220);

the airfoil structure (600) is provided with an air inlet (621) and an air outlet (622), the air inlet (621) is communicated with the first air supply channel (210), and the air outlet (622) is communicated with the cavity (3);

the air supply device is characterized in that a stand column inner cavity is arranged in the stand column structure (500), an air supply groove is formed in the side, close to the cavity (3), of the stand column structure (500), wherein the second air supply channel (220) is communicated with the stand column inner cavity, and the stand column inner cavity is communicated with the air supply groove.

2. An air-supplementing exhaust hood according to claim 1, characterized in that said airfoil structure (600) comprises:

the air wing arc plate (610) is arranged at the front part, and the arc of the air wing arc plate (610) is convex towards the front part;

the air wing side plate (620) is arranged at the rear part, the air wing side plate (620) is vertically arranged, the air outlet (622) is formed in the upper part of the air wing side plate (620), and the air inlet (621) is formed in the lower part of the air wing side plate (620);

an airfoil bottom plate (630) disposed at the bottom, the airfoil bottom plate (630) being disposed horizontally;

an airfoil chamber (640) enclosed by the airfoil circular arc plate (610), the airfoil side plate (620) and the airfoil bottom plate (630); and

the inner air deflector (650) is arranged in the airfoil cavity (640), one end of the inner air deflector is positioned at the joint of the airfoil side plate (620) and the airfoil bottom plate (630), and the other end of the inner air deflector is positioned on the inner wall of the airfoil circular arc plate (610), so that the airfoil cavity (640) is divided into an airfoil first cavity (641) and an airfoil second cavity (642) from front to back;

the wind in the first wind supply channel (210) of the static pressure box (200) enters the second chamber (642) of the airfoil from the wind inlet (621), and is guided by the inner wind deflector (650) to be discharged from the wind outlet (622) to the chamber (3).

3. An air supplement exhaust cabinet according to claim 2, characterized in that: the total area of the air inlet (621) is 4-6 times of the total area of the air outlet (622).

4. An air supplement exhaust cabinet according to claim 3, characterized in that: the included angle theta between the air wing side plate (620) and the inner air deflector (650) is set to be 20-70 degrees.

5. An air supplement exhaust cabinet according to claim 4, characterized in that: the airfoil bottom plate (630) extends backwards to form a bearing plate (660), and the static pressure box (200) is detachably connected to the bearing plate (660); the air wing arc plate (610) extends backwards to form a guide plate (670).

6. An air supplement exhaust cabinet according to claim 1, characterized in that: the upright post structure (500) comprises an upright post body, and an upright post first chamber (512) is enclosed by the front end of the interior of the upright post structure; the upright post body comprises an upright post outer side wall (520) arranged at the left end, an upright post inclined wall (530) arranged at the front end and forming an acute angle with the upright post outer side wall (520), an upright post inner side wall (540) arranged at the right end and an upright post rear side wall (550) arranged at the rear end, wherein the air supplementing groove is arranged between the upright post inner side wall (540) and the upright post inclined wall (530), and is provided with a vertical through groove (511);

the vertical through groove (511) is provided with a vertical column inclined wall (530) arranged on the right side of the inner side wall (540) of the vertical column; the vertical through groove (511) is communicated with the column first chamber (512);

the air in the second air supply channel (220) of the static pressure box (200) enters the first chamber (512) of the upright post and is discharged through the vertical through groove (511).

7. An air supplement exhaust cabinet according to claim 6, characterized in that: the width of the vertical through groove (511) is less than or equal to 1/5 times of the width of the first cavity (512) of the upright post.

8. An air supplement exhaust cabinet according to claim 7, characterized in that: the setting range of an included angle beta between the upright post inclined wall (530) and the upright post outer side wall (520) is 20-70 degrees.

9. An air supplement exhaust cabinet according to claim 1, characterized in that: at least one first air supply channel (210) is arranged, and the second air supply channels (220) are arranged on two sides of the static pressure box (200) and close to the side plates (400); the tail parts of the first air supply channel (210) and the second air supply channel (220) are respectively provided with a plurality of groups of fans (250).

10. An air supplement exhaust cabinet according to claim 9, characterized in that: the first air supply channel (210) is of a structure with a large front part and a small back part; the second air supply channel (220) is arranged in a structure with a small front part and a big rear part; and a connecting pipe (570) for communication is arranged between the first air supply channel (210) and the upright post.