A kind of air supply and exhaust cabinet

Abstract

The invention discloses an air supply exhaust cabinet, comprising an exhaust cabinet body and a visual window, wherein a chamber with an opening on the front side is formed inside the exhaust cabinet body, a workbench is arranged at the lower part of the chamber, a static pressure box capable of supplying air into the chamber is arranged at the bottom of the workbench, a top plate is arranged at the top of the exhaust cabinet body, side plates are arranged at both sides of the exhaust cabinet body, and a column structure is connected to the front end of the side plate; the exhaust cabinet body also comprises an air wing structure, which is arranged at the front lower part of the chamber and connected to 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 connected to the first air supply channel, and the air outlet is connected to the chamber; the column structure comprises a column inner cavity, and an air supply groove is arranged near the chamber side of the column structure, wherein the second air supply channel is connected to the column inner cavity, and the column inner cavity is connected to the air supply groove. In this way, the air supply effect is improved, the air flow in the exhaust cabinet is ensured to be stable, and energy consumption can be reduced without using a high-power fan.

Description

Technical Field

[0001] The invention relates to the technical field of laboratory exhaust equipment, and in particular to an air supply exhaust cabinet. Background Art

[0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

[0003] Laboratory ventilation is an indispensable part of laboratory design. In order to prevent laboratory workers from inhaling or swallowing some toxic, pathogenic or unknown toxic chemicals and organisms, the laboratory should have good ventilation. In order to prevent the absorption of some vapors, gases and particles (smoke, soot, dust and aerosols), pollutants must be removed by exhaust cabinets, fume hoods or local ventilation.

[0004] The fume hood is the most commonly used local exhaust equipment in the laboratory. Generally speaking, the top of the fume hood is equipped with an exhaust device to exhaust toxic and harmful gases to the outside. The side of the fume hood facing the operator is set with a sliding window. When in use, pull the window down to leave a certain space between the workbench in the fume hood and the operator, enough for the operator to operate on the workbench. The moment the operator opens the window, the outside air enters the fume hood, disturbing the gas in the fume hood and causing the turbulent airflow inside the fume hood to overflow.

[0005] Therefore, there is an urgent need for an air supply and exhaust cabinet to overcome the above problems. Summary of the invention

[0006] In order to solve the deficiencies in the prior art, the present invention provides an air supply and exhaust cabinet.

[0007] The technical solution of the present invention is:

[0008] The present invention provides an air supply exhaust cabinet, comprising an exhaust cabinet body and a visual window connected to the exhaust cabinet body, wherein a chamber with a front opening is formed inside the exhaust cabinet body, a workbench is arranged at the lower part of the chamber, a static pressure box capable of supplying air into the chamber is arranged at the bottom of the workbench, a top plate is arranged at the top of the exhaust cabinet body, side plates are arranged at both sides of the exhaust cabinet body, and a column structure is connected to the front end of the side plate; the exhaust cabinet body also includes an air wing structure, which is arranged at the front lower part of the chamber and connected to the static pressure box;

[0009] The static pressure box includes a first air supply channel and a second air supply channel;

[0010] 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 chamber;

[0011] The column structure includes a column inner cavity, and the column structure is provided with an air supply groove near the chamber side, wherein the second air supply channel is connected with the column inner cavity, and the column inner cavity is connected with the air supply groove.

[0012] Furthermore, the air wing structure comprises:

[0013] An air wing arc plate is arranged at the front, and the arc of the air wing arc plate protrudes forward;

[0014] An air wing side panel is arranged at the rear, the air wing side panel is arranged vertically, the air outlet is opened at the upper part of the air wing side panel, and the air inlet is opened at the lower part;

[0015] An air wing bottom plate is arranged at the bottom, and the air wing bottom plate is arranged horizontally;

[0016] an air wing chamber, which is surrounded by the air wing arc plate, the air wing side plate and the air wing bottom plate; and

[0017] An inner air guide plate is arranged in the air wing chamber, one end of which is located at the connection between the air wing side plate and the air wing bottom plate, and the other end is located on the inner wall of the air wing arc plate, dividing the air wing chamber from front to back into an air wing first chamber and an air wing second chamber;

[0018] The wind in the first air supply channel of the static pressure box enters the second chamber of the air wing through the air inlet, and is then guided by the inner air guide plate and discharged into the chamber through the air outlet.

[0019] Furthermore, the total area of ​​the air inlets is 4 to 6 times the total area of ​​the air outlets.

[0020] Furthermore, the angle θ between the air wing side panel and the inner wind guide plate is set in the range of 20° to 70°.

[0021] Furthermore, a bearing plate is extended backwards from the air wing bottom plate, and the static pressure box is detachably connected to the bearing plate; a guide plate is extended backwards from the air wing arc plate.

[0022] Furthermore, the column structure includes a vertical column body, the front end of which is surrounded by a first column chamber; the column body includes an outer column wall arranged at the left end, an inclined column wall arranged at the front end and having an acute angle with the outer column wall, an inner column wall arranged at the right end, and a rear column wall arranged at the rear end, the air supply groove is arranged between the inner column wall and the inclined column wall, and the air supply groove is arranged as a vertical through groove;

[0023] At the vertical through groove, the column inclined wall is arranged on the right side of the inner wall of the column; the vertical through groove is communicated with the first cavity of the column;

[0024] The air in the second air supply channel of the static pressure box enters the first chamber of the column and is then discharged through the vertical through slot.

[0025] Furthermore, the width of the vertical through groove is less than or equal to 1 / 5 times the width of the first cavity of the column.

[0026] Furthermore, the angle β between the inclined wall of the column and the outer side wall of the column is set in the range of 20° to 70°.

[0027] Furthermore, there is at least one first air supply channel, and the second air supply channel is arranged on both sides of the static pressure box and close to the side plate; and a plurality of sets of fans are arranged at the tail of the first air supply channel and the second air supply channel.

[0028] Furthermore, the first air supply channel is configured as a structure with a larger front portion and a smaller rear portion; the second air supply channel is configured as a structure with a smaller front portion and a larger rear portion; and a connecting pipe for communication is provided between the first air supply channel and the column.

[0029] The beneficial effects achieved by the present invention are:

[0030] The air supply exhaust cabinet of the present invention combines an air wing structure, a static pressure box and a column structure, optimizes the structural design of the exhaust cabinet, and improves the air supply effect by the airflow, thereby ensuring the stability of the airflow in the exhaust cabinet, improving the exhaust efficiency of harmful gases, and reducing the face wind speed. Compared with traditional exhaust cabinets, the air supply effect is increased and the anti-interference ability is enhanced, ensuring that harmful gases do not leak or escape; there is no need to use traditional high-power fans, thereby achieving the purpose of reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0032] Figure 2 It is a side sectional schematic diagram of the present invention.

[0033] Figure 3 It is a schematic diagram of the main structure of the present invention (visible window omitted).

[0034] Figure 4 It is a schematic cross-sectional view of the airfoil structure of the present invention.

[0035] Figure 5 It is a structural schematic diagram of the airfoil structure from a certain perspective of the present invention.

[0036] Figure 6 It is a schematic diagram of air flow of the air wing structure of the present invention.

[0037] Figure 7 It is a schematic cross-sectional view of the column structure of the present invention.

[0038] Figure 8It is a structural schematic diagram of the column structure of the present invention from a certain viewing angle.

[0039] Fig. 9 It is a schematic diagram of air flow of the column structure of the present invention.

[0040] Fig.10 It is a schematic diagram of a partial explosion of the structure of the static pressure box of the present invention.

[0041] Fig.11 yes Fig.10 A partial enlarged schematic diagram of point Ⅰ in the middle.

[0042] Fig.12 It is a flow diagram of the airflow of the static pressure box of the present invention.

[0043] Fig.13 It is a schematic diagram of the assembly state of an airfoil structure, a static pressure box, a workbench and a column structure according to an embodiment of the present invention.

[0044] Fig.14 yes Fig.13 A partial enlarged schematic diagram of point II in the middle.

[0045] In the figure, 1, exhaust cabinet body; 2, visual window; 21, upper profile; 22, lower profile; 3, chamber; 4, exhaust device; 5, storage cabinet; 100, workbench; 200, static pressure box; 210, first air supply channel; 220, second air supply channel; 230, static pressure box shell; 231, cover plate; 232, lower shell; 2321, first ventilation slot; 2322, second ventilation slot; 240, partition; 250, fan; 300, top plate; 400, side plate; 500, column structure; 510, air supply duct; 511, vertical through groove; 512, first chamber of column; 520, outer wall of column; 530, inclined wall of column; 531, first air supply wing; 540, inner wall of column; 541, second air supply wing; 542, second slide groove; 5 50. rear side wall; 551. first slide slot; 560. second column chamber; 570. connecting pipe; 580. column cover; 581. air guide cover; 600. air wing structure; 610. air wing arc plate; 620. air wing side plate; 621. air inlet; 6211. first hole; 622. air outlet; 6221. second hole; 630. air wing bottom plate; 640. air wing chamber; 641. first air wing chamber; 642. second air wing chamber; 650. inner air guide plate; 660. bearing plate; 670. guide plate; 680. air wing cover; 700. back plate; 800. exhaust air guide assembly; 810. first air guide plate; 820. second air guide plate; 830. third air guide plate; 831. socket; 832. water tank device; 840. fixed guide clip. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0048] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0049] It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0051] To facilitate those skilled in the art to understand the present invention, the following Figures 1 to 14 A specific embodiment of the present invention will be described.

[0052] like Figures 1 to 3As shown, the present invention provides an air supply exhaust cabinet, including an exhaust cabinet body 1 and a visual window 2 connected to the exhaust cabinet body 1, a chamber 3 with a front opening is formed inside the exhaust cabinet body 1, a workbench 100 is arranged at the lower part of the chamber 3, a static pressure box 200 that can supply air into the chamber 3 is arranged at the bottom of the workbench 100, a top plate 300 is arranged on the top of the exhaust cabinet body 1, side plates 400 are arranged on both sides of the exhaust cabinet body 1, and a column structure 500 is connected to the front end of the side plate 400; the exhaust cabinet body 1 also includes an air wing structure 600. The air wing structure 600 is arranged at the front lower part of the chamber 3 and is connected to the static pressure box 200;

[0053] The static pressure box 200 includes a first air supply passage 210 and a second air supply passage 220;

[0054] The air wing structure 600 is provided with an air inlet 621 and an air outlet 622, wherein the air inlet 621 is communicated with the first air supply channel 210, and the air outlet 622 is communicated with the chamber 3;

[0055] The column structure 500 includes a column inner cavity, and an air supply groove is opened on the side of the column structure 500 close to the chamber 3, wherein the second air supply channel 220 is connected with the column inner cavity, and the column inner cavity is connected with the air supply groove.

[0056] The column structure 500 is used in combination with the air wing structure 600, the static pressure box 200 and the exhaust device arranged in the exhaust cabinet to more effectively prevent the gas in the cabinet from overflowing.

[0057] like Figure 2 As shown, the fume hood further includes an exhaust air guide assembly 800 disposed at the rear of the chamber 3, the exhaust air guide assembly 800 is fixed to the top plate 300 and the back plate 700 by a fixed guide clip 840, and there is a gap between the bottom of the exhaust air guide assembly 800 and the workbench 100. There is a gap between the exhaust air guide assembly 800 and the back plate 700.

[0058] The exhaust air guide assembly 800 includes a first air guide plate 810 , a second air guide plate 820 and a third air guide plate 830 from top to bottom. There is a distance between the second air guide plate 820 and the third air guide plate 830 , and there is a distance between the third air guide plate 830 and the workbench 100 .

[0059] In order to meet the needs of various experiments in the fume hood, a socket 831 and a water tank device 832 for receiving water are installed on the third air guide plate 830. Figure 3 As shown, there are several sockets 831 that can be used to connect various powered instruments or detection equipment; the sink device 832 includes a water pipe and a sink, which can be used to wash medicine bottles or reagent bottles. The operator can complete the work in the exhaust cabinet, which is more in line with actual needs, more humane, and improves the user's experience.

[0060] The air outlet of the air exhaust device 4 is arranged between the top plate 300 and the first air guide plate 810. In this embodiment, the fixed air guide clip 840 is fixed to the back plate 700 by screws, and there are several fixed air guide clips 840, which can be evenly arranged.

[0061] like Figure 1 As shown, a storage cabinet 5 for placing articles is also provided at the lower part of the exhaust cabinet.

[0062] like Figure 1 , 2 As shown, one side of the upper profile 21 and the lower profile 22 of the visual window 2 are both arranged to be an arc structure. The arc structure of the upper profile 21 is arranged on the side close to the chamber 3 and protrudes into the chamber 3, and the arc structure of the lower profile 22 is arranged on the side away from the chamber 3 and protrudes outward. Such an arc structure is streamlined and guiding, which prevents gas from overflowing and is more conducive to air replenishment.

[0063] Specifically, if Figures 4 to 6 As shown, the airfoil structure 600 includes:

[0064] An air wing arc plate 610 is arranged at the front, and the arc of the air wing arc plate 610 protrudes to the front; an air wing side plate 620 is arranged at the rear, and the air wing side plate 620 is arranged vertically, and an air outlet 622 is opened at the upper part of the air wing side plate 620, and an air inlet 621 is opened at the lower part; an air wing bottom plate 630 is arranged at the bottom, and the air wing bottom plate 630 is arranged horizontally; an air wing chamber 640 is surrounded by the air wing arc plate 610, the air wing side plate 620 and the air wing bottom plate 630; and an inner air guide plate 650 is arranged in the air wing chamber 640, one end of which is located at the connection between the air wing side plate 620 and the air wing bottom plate 630, and the other end is located on the inner wall of the air wing arc plate 610, so as to divide the air wing chamber 640 into an air wing first chamber 641 and an air wing second chamber 642 from front to back;

[0065] The wind blown from the first air supply channel 210 of the static pressure box 200 enters the second air wing chamber 642 through the air inlet 621 , is guided by the inner air guide plate 650 , and is discharged from the air outlet 622 .

[0066] The wind in the static pressure box 200 passes through the air wing structure 600, converting part of the dynamic pressure into static pressure, reducing the speed, and making the wind speed at the air outlet 622 blow evenly into the exhaust cabinet, which is more conducive to ensuring the stability of the wind speed in the exhaust cabinet.

[0067] The arc of the air wing arc plate 610 protrudes forward. Such a streamlined design has a guiding effect, which can make the external wind at the front end of the exhaust cabinet enter the exhaust cabinet more smoothly, and assist the air flow to replenish air.

[0068] The inner air guide plate 650, the air wing side plate 620 and the air wing bottom plate 630 form the air wing second chamber 642. The inner air guide plate 650 has two functions. First, the wind speed entering the air inlet 621 is relatively high, and the air guide plate slows down the wind speed and reduces the wind speed. Second, the inner air guide plate 650 is inclined, which guides the wind direction, which is more conducive to exhausting the air from the air outlet 622 and making the wind speed uniform.

[0069] In order to further ensure the air flow supplement effect, the total area of ​​the air inlet 621 is 4 to 6 times the total area of ​​the air outlet 622.

[0070] In this embodiment, the air inlet 621 is configured as a plurality of air wing first holes 6211 evenly arranged laterally, and the air outlet 622 is configured as a plurality of air wing second holes 6221 evenly arranged laterally.

[0071] like Figure 5 As shown, the first hole 6211 of the air wing is a horizontally arranged long strip hole, and the second hole 6221 of the air wing is a horizontally arranged rectangular slot hole. The number of the first hole 6211 and the second hole 6221 of the air wing is set according to parameters such as size and air volume, and the present invention does not impose any limitation on this.

[0072] The angle θ between the air wing side plate 620 and the inner air guide plate 650 is set in the range of 20° to 70°, which can enhance the air flow supplement effect.

[0073] In this embodiment, the angle θ between the air wing side panel 620 and the inner wind guide plate 650 is selected to be 45°.

[0074] In order to make the assembly of the air wing structure 600 and the static pressure box 200 more secure and reliable, a bearing plate 660 is extended backward from the air wing bottom plate 630 , and the bottom of the static pressure box 200 abuts against the bearing plate 660 .

[0075] The air wing arc plate 610 extends backward to form a guide plate 670. When the wind is discharged from the air outlet 622, the guide plate 670 can guide the wind direction.

[0076] 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.

[0077] In order to ensure that the airflow does not leak from the left and right sides of the airfoil structure 600, airfoil covers 680 are installed at the left and right ends of the airfoil structure 600. The installation method can be a snap connection or a screw connection. The installation method is not limited in the present invention.

[0078] It should be noted that Figure 2 , 6 The arrows in , 9, 12, and 13 point to the direction in which the wind or airflow moves.

[0079] Working process of air wing structure 600:

[0080] like Figures 4 to 6 As shown, the wind passing through the air wing structure 600 enters the exhaust cabinet from two places. The front end enters the exhaust cabinet along the air wing arc plate 610, and the rear end enters the second chamber 642 of the air wing through the air inlet 621. The wind is reflected by the internal air guide plate 650 to guide and reduce the speed of the wind. The wind is discharged from the air outlet 622 and enters the chamber 3 of the exhaust cabinet along the guide plate 670.

[0081] It should be noted that the column structure 500 of the exhaust cabinet consists of a left column and a right column, and the structures of the two are mirror images of each other. The left column (referred to as the column structure 500) is used as an example to illustrate the specific structure and connection relationship, and the right column is not repeated.

[0082] Specifically, if Figures 7-9 As shown, the column structure 500 includes:

[0083] The vertical column body includes a first column chamber 512 and a second column chamber 560, which are enclosed from front to back. The first column chamber 512 and the second column chamber 560 are separated by a beam disposed between the column outer wall 520 and the column inner wall 540. Of course, the number of the chambers 3 of the column is not limited thereto, and there may be three chambers 3. The specific number of the chambers 3 is not limited in the present invention.

[0084] The column body includes an outer column wall 520 arranged at the left end, an inclined column wall 530 arranged at the front end and integrally connected to the outer column wall 520, an inner column wall 540 arranged at the right end, and a rear column wall 550 arranged at the rear end. A vertical through groove 511 is arranged between the inner column wall 540 and the inclined column wall 530. At the vertical through groove 511, the inclined column wall 530 is arranged on the right side of the inner column wall 540. The vertical through groove 511 is connected to the first column chamber 512, and the vertical through groove 511 and the first column chamber 512 form an air supply duct 510. The air in the second air supply channel 220 of the static pressure box 200 enters the air supply duct 510, which can play a role in air supply, especially when the operator stands in front of the exhaust cabinet when using it, reaches into the exhaust cabinet to perform experimental operations or approaches the exhaust cabinet for observation, which can effectively reduce the rotating airflow entering the exhaust cabinet. The column structure 500 is used in combination with the air wing structure 600, the static pressure box 200 and the exhaust device arranged in the exhaust cabinet to more effectively prevent the gas in the cabinet from overflowing.

[0085] like Figure 7 As shown, the width of the vertical through slot 511 is set to L1, and the width of the first column chamber 512 is set to L2. In order to ensure the air supply effect of the air supply duct 510, L1≤(1 / 5)L2.

[0086] A first air supply wing 531 extends backward from the inclined wall 530 of the column, so as to guide the airflow.

[0087] A second air supply wing 541 is extended from the inner side wall 540 of the column toward the front column inclined wall 530 , so as to guide the airflow.

[0088] Furthermore, the distance between the first air-supplementing wing 531 and the inner wall 540 of the column is equal to the distance between the second air-supplementing wing 541 and the inclined wall 530 of the column, which has a better airflow guiding effect.

[0089] like Figure 7 As shown, the angle β between the column inclined wall 530 and the column outer wall 520 is an acute angle, which makes the airflow have a guiding effect when flowing into the exhaust cabinet, making it easier to replenish air. The angle β is set in the range of 20° to 70°.

[0090] In order to ensure the air supply effect of the air supply duct 510, a column cover 580 is installed at the bottom of the column structure 500, specifically at the bottom of the first column chamber 512, for bottom sealing, thereby preventing part of the wind from flowing out from the bottom of the first column chamber 512. The column cover 580 and the column structure 500 can be installed in a snap-fit ​​connection or a screw connection, and the installation method is not limited in this invention. The column cover 580 is also provided with an integral air guide cover 581. After the column cover 580 and the first column chamber 512 are installed, the air guide cover 581 is located in the first column chamber 512, and the guide cover is a semi-open arc structure and faces the direction of the wind.

[0091] In this embodiment, the angle β between the pillar inclined wall 530 and the pillar outer side wall 520 is set to 30°.

[0092] like Figure 7 As shown, the column inclined wall 530 and the column outer side wall 520 are connected by an arc transition, so that the connection is streamlined, which is more conducive to the air supply of the column inclined wall 530.

[0093] In this embodiment, a first slide groove 551 is provided on the rear side wall 550 of the column, and the first slide groove 551 is used to install the side panel 400 of the exhaust cabinet, and the structure of the first slide groove 551 matches the end structure of the side panel 400 connected thereto. When installing, the side panel 400 is inserted into the first groove, and the installation is simple and quick.

[0094] In this embodiment, a second slide groove 542 is provided on the inner side plate 400 of the column. The second slide groove 542 is used to install the visual window 2 of the exhaust cabinet, and is arranged longitudinally. The specific structure is an arc shape. According to the different leakage prevention levels of the exhaust cabinet, a second slide groove 542 is also reserved on the side column to facilitate the installation of double-layer glass.

[0095] Working process of column structure 500:

[0096] like Figure 8 , 9 As shown, when the air in front of the exhaust hood enters the exhaust hood, a part of it enters from the front of the exhaust hood along the inclined wall 530 of the column, and the other part enters through the air supply duct 510. When a rotating airflow appears in front of the exhaust hood, air supply can be carried out through the column structure 500 to reduce the unevenness of the air flow field.

[0097] The invention optimizes the column structure 500, enhances the air supply effect, speeds up the air movement of the exhaust hood, further increases the overall air supply effect of the exhaust hood, and improves the performance of the exhaust hood.

[0098] Specifically, if Figures 10-12 As shown, the static pressure box 200 includes:

[0099] The static pressure box housing 230 is divided into a plurality of air supply channels by a partition 240 in the housing, and the air supply channels are divided into a first air supply channel 210 and a second air supply channel 220. The front end of the static pressure box housing 230 is provided with a first ventilation slot 2321 and a second ventilation slot 2322, and the rear end is provided with a mounting slot for installing a fan 250. A plurality of fans 250 are installed at the tail end of each air supply channel, and the fan 250 is a fan 250 that supplies air from the back to the front.

[0100] The front end surface of the static pressure box 200 is in contact with the air wing side panel 620 of the air wing structure 600, and the position of the first ventilation slot 2321 opened at the front end of the static pressure box 200 corresponds to the position of the air inlet 621, thus ensuring that the wind can smoothly enter the air wing structure 600 from the static pressure box 200.

[0101] The first ventilation slot 2321 is used in conjunction with the first air supply channel 210 , and the fan 250 supplies air. The wind from the first air supply channel 210 is blown out through the first ventilation slot 2321 , enters the air wing structure 600 through the air inlet 621 , and is discharged from the air outlet 622 into the chamber 3 .

[0102] The second ventilation slots 2322 are provided at both ends of the front end surface of the static pressure box 200 for communicating with the columns.

[0103] The number of the first air supply channel 210 is at least one.

[0104] like Fig.10 , 11As shown, in this embodiment, the static pressure box shell 230 includes a lower shell 232 and a cover plate 231, which can be connected by bolts, riveting or welding. The front end of the lower shell 232 is provided with a first ventilation slot 2321 and second ventilation slots 2322 arranged at both ends of the first ventilation slot 2321. The number of the first air supply channels 210 is two, and both are connected to the air wing structure 600. The number of the second air supply channels 220 is two, which are respectively arranged on both sides of the static pressure box 200 and close to the side plate 400. The second air supply channels 220 on each side are respectively connected to the column structure 500 on the same side.

[0105] like Fig.13 As shown, in order to ensure the connection effect, a connecting pipe 570 is provided between the column structure 500 and the second air supply channel 220. The connecting pipe 570 is arranged in the column structure 500, one end of which is connected to the second air supply channel 220, and the other end of which is connected to the first chamber 512 of the column.

[0106] like Fig.13 As shown, the first air supply channel 210 is configured as a structure with a large front and a small rear, so that the wind entering the air wing structure 600 becomes gentler and more uniform; the second air supply channel is configured as a structure with a small front and a large rear, so that the wind speed is increased, and a larger amount of wind enters the first cavity 512 of the column. This structural setting makes the supplementary wind speed at the air wing structure 600 and the column structure 500 more uniform and consistent, which is more in line with actual needs.

[0107] like Figure 2 As shown, the working process of the exhaust cabinet:

[0108] When the exhaust device 4 and the fan 250 are started and the operator conducts an experiment in the fume hood, a part of the wind is blown into the air wing structure 600 through the first air supply channel 210 of the static pressure box 200 and then blown into the chamber 3 through the air outlet 622, and another part of the wind is blown into the column structure 500 through the second air supply channel 220 of the static pressure box 200 and then blown into the chamber 3 through the vertical through slot 511; at the same time, the air in the laboratory enters the chamber 3 through the inclined wall 530 of the column of the fume hood, and the air in the laboratory is also blown out through the visual window 2 The upper profile 21 and the lower profile 22 enter the chamber 3; the above structures all supply air to the chamber 3 of the exhaust cabinet, and the airflow in the chamber 3 flows along the exhaust air guide assembly 800 toward the exhaust device 4, so that the airflow in the chamber 3 remains stable, the exhaust efficiency of harmful gases is improved, and the facial wind speed is reduced. Compared with the traditional exhaust cabinet, the air supply effect is increased and the anti-interference ability is enhanced, ensuring that the harmful gases do not leak or escape; there is no need to use traditional high-power fans, thereby achieving the purpose of reducing energy consumption.

[0109] The above-described embodiments of the present invention do not constitute a limitation on the protection scope of the present invention. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An air supply and exhaust cabinet, characterized in that: The invention comprises an exhaust cabinet body (1) and a visual window (2) connected to the exhaust cabinet body (1), wherein a chamber (3) with a front opening is formed inside the exhaust cabinet body (1), a workbench (100) is arranged at the lower part of the chamber (3), a static pressure box (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 body (1), side plates (400) are arranged on both sides of the exhaust cabinet body (1), and a column structure (500) is connected to the front end of the side plate (400); the exhaust cabinet body (1) also comprises an air wing structure (600), and the air wing structure (600) is arranged at the lower front part of the chamber (3) and connected to the static pressure box (200); The static pressure box (200) comprises a first air supply channel (210) and a second air supply channel (220); The air wing structure (600) is provided with an air inlet (621) and an air outlet (622), the air inlet (621) is in communication with the first air supply channel (210), and the air outlet (622) is in communication with the chamber (3); The column structure (500) includes a column inner cavity, and the column structure (500) is provided with an air supply groove near the chamber (3), wherein the second air supply channel (220) is connected to the column inner cavity, and the column inner cavity is connected to the air supply groove; The air wing structure (600) comprises: an air wing arc plate (610) arranged at the front, the arc of the air wing arc plate (610) protruding to the front; an air wing side plate (620) arranged at the rear, the air wing side plate (620) being arranged vertically, the air outlet (622) being provided at the upper part of the air wing side plate (620), and the air inlet (621) being provided at the lower part; an air wing bottom plate (630) arranged at the bottom, the air wing bottom plate (630) being arranged horizontally; and an air wing chamber (640) consisting of the air wing arc plate (610), the air wing side plate (620) and the air wing bottom plate (630). and an inner air guide plate (650) disposed in the air wing chamber (640), one end of which is located at the connection between the air wing side plate (620) and the air wing bottom plate (630), and the other end of which is located on the inner wall of the air wing arc plate (610), so as to divide the air wing chamber (640) from front to back into an air wing first chamber (641) and an air wing second chamber (642); air in the first air supply channel (210) of the static pressure box (200) enters the air wing second chamber (642) through the air inlet (621), and is then guided by the inner air guide plate (650) and discharged from the air outlet (622) into the chamber (3); The air inlet (621) is configured as a plurality of air wing first holes (6211) evenly arranged laterally, and the air outlet (622) is configured as a plurality of air wing second holes (6221) evenly arranged laterally; The visual window (2) comprises an upper profile (21) and a lower profile (22), one side of the upper profile (21) and the lower profile (22) are both arranged to be arc-shaped structures, the arc-shaped structure of the upper profile (21) is arranged on a side close to the chamber (3) and protrudes into the chamber (3), and the arc-shaped structure of the lower profile (22) is arranged on a side away from the chamber (3) and protrudes outward.

2. The air supply and exhaust cabinet according to claim 1, characterized in that: The total area of ​​the air inlet (621) is 4 to 6 times the total area of ​​the air outlet (622).

3. The air supply and exhaust cabinet according to claim 2, characterized in that: The included angle θ between the air wing side plate (620) and the inner air guide plate (650) is set in the range of 20° to 70°.

4. The air supply and exhaust cabinet according to claim 3 is characterized in that: The air wing bottom plate (630) extends backwards to form a bearing plate (660), to which the static pressure box (200) is detachably connected; and the air wing arc plate (610) extends backwards to form a guide plate (670).

5. The air supply and exhaust cabinet according to claim 1, characterized in that: The column structure (500) comprises a vertical column body, the front end of which is surrounded by a column first chamber (512); the column body comprises a column outer side wall (520) arranged at the left end, a column inclined wall (530) arranged at the front end and forming an acute angle with the column outer side wall (520), a column inner side wall (540) arranged at the right end, and a column rear side wall (550) arranged at the rear end, the air supply groove being arranged between the column inner side wall (540) and the column inclined wall (530), and the air supply groove being arranged as a vertical through groove (511); At the vertical through groove (511), the column inclined wall (530) is arranged on the right side of the column inner wall (540); the vertical through groove (511) is connected to the first chamber (512) of the column; The wind in the second air supply channel (220) of the static pressure box (200) enters the first chamber (512) of the column and is then discharged through the vertical through slot (511).

6. The air supply and exhaust cabinet according to claim 5, characterized in that: The width of the vertical through groove (511) is less than or equal to 1 / 5 times the width of the first cavity (512) of the column.

7. The air supply and exhaust cabinet according to claim 6, characterized in that: The included angle β between the column inclined wall (530) and the column outer side wall (520) is set in the range of 20° to 70°.

8. The air supply and exhaust cabinet according to claim 1, characterized in that: There is at least one first air supply channel (210), and the second air supply channel (220) is arranged on both sides of the static pressure box (200) and close to the side plate (400); a plurality of groups of fans (250) are arranged at the tail of each of the first air supply channel (210) and the second air supply channel (220).

9. The air supply and exhaust cabinet according to claim 8, characterized in that: The first air supply channel (210) is configured as a structure with a larger front and a smaller rear portion; the second air supply channel is configured as a structure with a smaller front and a larger rear portion; and a connecting pipe (570) for communication is provided between the first air supply channel (210) and the column.

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