A low-noise and high-efficiency laboratory fume hood

Abstract

The present invention specifically discloses a low-noise and high-efficiency air supply cabinet for laboratories, which relates to the technical field of laboratory fume hoods, and comprises an experimental cabinet body, a cabinet cavity, a placement horizontal plate arranged in the middle of the cabinet cavity, a control box installed at the front end of the experimental cabinet body for controlling all electric control accessories, a window arranged at the front side of the experimental cabinet body and connected with the cabinet cavity, and a rear cabinet box installed at the rear side of the control box, wherein a negative pressure bucket connected with the cabinet cavity is installed in the middle of the rear cabinet box, and an air duct connected with the negative pressure bucket is installed at the rear side of the rear cabinet box, a fan is installed inside the air duct, and a linkage design between a movable plate and a longitudinal material opening is adopted, so that when the movable plate is relatively displaced under the control of a driving mechanism, the longitudinal material opening can be automatically opened, and the crushed materials placed on the horizontal plate can be pushed to fall through the longitudinal material opening for centralized collection, thereby greatly reducing the cleaning work after the experiment and improving the cleanliness and utilization efficiency of the laboratory.

Description

Technical Field

[0001] The present invention specifically relates to a low-noise and high-efficiency air supply cabinet for a laboratory, and relates to the technical field of laboratory fume hoods. Background Art

[0002] In the current laboratory environment, the fume hood, also known as the fume hood, is a key device to ensure the safety and efficiency of the experiment. It can play the role of ventilation in the laboratory. Its performance directly affects the overall operation of the laboratory. However, there are obvious deficiencies in the actual use of the fume hood in the laboratory, which are mainly reflected in the following aspects:

[0003] In the process of conducting experiments, it is inevitable that various experimental fragments and debris will be generated. The traditional fume hood lacks an effective automatic collection system, which causes these fragments to be scattered around, which not only increases the workload of cleaning after the experiment, but also may cause safety hazards and environmental pollution; and the air flow space of existing fume hoods is mostly fixed, and the air circulation effect is adjusted and controlled only by the rotation power of the fan. It is impossible to flexibly adjust the ventilation space to concentrate or disperse according to the experimental needs, which makes it difficult to achieve the optimal air flow efficiency and purification effect. The air supply volume and wind speed often cannot meet the use requirements. The use effect of the equipment is general, which reduces the overall work efficiency of the laboratory. Therefore, it is necessary to propose a low-noise and high-efficiency laboratory fume hood to improve the above problems. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an improved low-noise and high-efficiency laboratory fume hood to solve the problems of inconvenient collection of debris, poor air flow space adjustability and general air supply effect, so as to improve the safety and work efficiency of the laboratory and solve the problems mentioned in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical scheme: a low-noise and high-efficiency laboratory air supply cabinet, comprising an experimental cabinet, a cabinet cavity, a placement horizontal plate arranged in the middle of the cabinet cavity, a control box installed at the front end of the experimental cabinet for controlling all electric control accessories, a window arranged at the front side of the experimental cabinet and connected to the cabinet cavity, and a rear cabinet box installed at the rear side of the control box, a negative pressure bucket connected to the cabinet cavity is installed in the middle of the rear cabinet box, and an air duct connected to the negative pressure bucket is installed at the rear side of the rear cabinet box, and a fan is installed inside the air duct;

[0006] A longitudinal material opening is provided in the middle of the placement transverse plate, and a movable plate is provided in the middle of the longitudinal material opening for opening and closing. Mobile plates are movably provided on both sides of the cabinet cavity, and a driving mechanism for driving the relative movable displacement of the two mobile plates is provided at the bottom of the cabinet cavity. A notch is provided in the middle of the front side of the two mobile plates, and the placement transverse plate is adapted to be inserted into the notch. When the two mobile plates are relatively displaced, the movable plate can be pushed to slide open the longitudinal material opening, and at the same time, the crushed materials on the placement transverse plate can be pushed into the longitudinal material opening for centralized collection;

[0007] The negative pressure bucket is rotatably connected to two elastic movable sheets inside, and the outer ends of the two elastic movable sheets are respectively connected to two movable plates, which can follow the relative movement of the two movable plates to gradually concentrate and reduce the space for air flow inside the negative pressure bucket and the cabinet cavity.

[0008] A further improvement based on the above technical solution is that a negative pressure baffle is installed in the opening cross section of the negative pressure bucket, and a rectangular sliding groove is horizontally opened in the middle of the negative pressure baffle, the rectangular sliding groove corresponds to the side where the horizontal plate is placed, one side of the two movable plates are in contact with the outer side of the negative pressure baffle, and the movable plate is installed with a rectangular sliding rod that can slide through the rectangular sliding groove, and a movable vertical rod is locked and installed at the end of the rectangular sliding rod, and one side of the movable vertical rod is in sliding contact with the inner side of the negative pressure baffle;

[0009] The upper and lower sides of the two elastic movable sheets are respectively in contact with the inner side of the negative pressure bucket, and the outer sides of the two elastic movable sheets are movably connected to the movable vertical rod.

[0010] A further improvement based on the above technical solution is that the elastic movable sheet includes an elastic film and an external support frame inserted around the outer edge of the elastic film, one end of the external support frame is universally connected to the movable vertical pole, and the other end is rotatably connected to the rear port of the negative pressure bucket. With the support of the external support frame, the upper and lower sides of the elastic film are always in adjacent contact with the upper and lower sides of the inner side of the negative pressure bucket, the front side of the elastic film is locked and connected to the movable vertical pole by screws, and the rear side of the elastic film is locked and connected to the inner side of the negative pressure bucket by screws.

[0011] A further improvement based on the above technical solution is that the outer support frame includes an inner rotating shaft rod, both ends of the inner rotating shaft rod are welded with outer connecting rods inclined outward, and the outer connecting rod is slidably and telescopically connected to a ball head shaft rod, one end of the ball head shaft rod is integrally provided with an insertion rod, and is slidably inserted into the inner side of the outer connecting rod through the insertion rod, and the two ends of the ball head shaft rods are respectively universally connected to the upper and lower sides of the movable vertical pole through ball heads.

[0012] A further improvement based on the above technical solution is that the placement cross plate, negative pressure baffle and front panel are all provided with a plurality of negative pressure air holes connected to the cabinet cavity, and the inner side of the control box is connected to the cabinet cavity through the negative pressure air holes of the front panel.

[0013] A further improvement based on the above technical solution is that a fill light board is rotatably embedded and installed on the opposite side of the top of the two movable plates, and a mounting hole is opened in the middle of the upper side of the movable plate, the mounting hole is rotatably connected with a telescopic push rod, and the telescopic end of the telescopic push rod is rotatably connected to the rear side of the fill light board, which is used to control the fill light board to rotate and adjust the angle on the opposite side of the movable plate.

[0014] A further improvement based on the above technical solution is that a material guide groove communicating with the negative pressure bucket and the cabinet cavity is horizontally opened at the bottom of the negative pressure baffle, and a layer of sound insulation cotton pad is compounded on the inner side of the air duct.

[0015] A further improvement based on the above technical solution is that a material receiving box is embedded in the rear side of the rear cabinet box, and the material receiving box is connected to the inner side of the cabinet cavity. An inclined guide platform is installed at the bottom of the cabinet cavity, and the inclined guide platform is located directly below the horizontal plate. The lower side of the inclined guide platform is inserted into one side of the material receiving box, and the inclined guide platform is installed with a heating plate.

[0016] A further improvement based on the above technical solution is that the driving mechanism includes a screw and a guide rod that respectively penetrate the two movable plates horizontally, wherein relative threads are respectively arranged on both sides of the screw to be threadedly connected with the two movable plates, and the experimental cabinet is equipped with a driving motor for driving the screw to rotate.

[0017] A further improvement based on the above technical solution is that a slot for the movable plate to slide is opened on the left side of the longitudinal material opening, and multiple first springs are installed in the slot and elastically connected to the movable plate, so that the right side of the movable plate is always elastically pressed against the right side of the longitudinal material opening; a vertical plate is installed at the bottom of the right side of the movable plate, and a second spring is installed on the right side of the movable plate. The elastic force of the second spring is greater than the elastic force of the first spring. When the movable plate is relatively displaced, it can contact the second spring and push the movable plate to move toward the slot through the first spring to open the longitudinal material opening.

[0018] By adopting the above technical solution, the present invention has the following advantages:

[0019] The invention opens a longitudinal material opening in the middle of the horizontal plate and cooperates with the ingenious design of the movable plate and the driving mechanism to realize the automatic collection of broken materials and the flexible adjustment of the air flow space, which significantly improves the efficiency and safety of the air supply cabinet. The specific beneficial effects are as follows:

[0020] The linkage design between the movable plate and the longitudinal material opening enables the movable plate to automatically open the longitudinal material opening when it is relatively displaced under the control of the driving mechanism, and push the broken materials placed on the horizontal plate to fall through the longitudinal material opening for centralized collection, which greatly reduces the cleaning work after the experiment and improves the cleanliness and use efficiency of the laboratory;

[0021] When the two movable plates are moved, the distance between them changes, and the elastic movable sheet can rotate and retract accordingly, thereby realizing the dynamic scaling of the air flow space between the negative pressure bucket and the cabinet cavity, that is, the air flow space between the two movable plates and between the two elastic movable sheets will increase the space for dispersed ventilation or reduce the space for concentrated ventilation as the movable plates are displaced;

[0022] When the concentrated ventilation of the space is reduced, the overall wind speed of the air flow space can be increased. This fine control of the width of the air flow path can make the air flow more concentrated, accelerate the conveying effect of polluted gases and debris, reduce suspended particles in the air, greatly improve the air purification efficiency of the air supply cabinet, and also help maintain an ideal negative pressure state, ensuring that the air circulation is both sufficient and orderly, and also help reduce unnecessary energy consumption;

[0023] In order to stabilize the movable plate so that the upper and lower sides of the elastic movable sheet are always in adjacent contact with the upper and lower sides of the inner side of the negative pressure bucket when the movable plate moves, the elastic film of the elastic movable sheet is supported by an external support frame, and the elastic film of the elastic movable sheet is made of elastic rubber or silicone material, so that the elastic film can rotate and elastically expand and contract with the displacement of the movable plate, so that the elastic film is fully in contact with the inner side of the negative pressure bucket, ensuring that the flow of wind force and wind direction is more stable;

[0024] Furthermore, a fill light board is rotatably embedded on the opposite side of the moving plate. Through the rotational connection between the telescopic push rod and the fill light board, the light irradiation angle can be flexibly adjusted. The experimenter can adjust the light direction at any time according to actual needs to ensure that the required corners can be properly illuminated. At the same time, this also provides the possibility of creating a better visual environment.

[0025] In addition, the fill light panel can not only provide sufficient lighting, but also act as a physical barrier. When the relative displacement of the moving panel reduces the space for centralized ventilation, the fill light panel can assist in adjusting the air flow path in the cabinet cavity. By changing the position and angle of the two fill light panels so that they are in contact with each other, the air flow area in the local area of ​​the top of the cabinet cavity can be effectively reduced, thereby achieving fine-tuning of the air flow and direction.

[0026] The inside of the control box is connected to the cabinet cavity under the horizontal plate through the negative pressure air holes on the front panel, so that when the whole equipment is ventilated, the inside of the control box can be cooled synchronously, thus improving the use effect of the equipment;

[0027] In addition, by installing an inclined guide platform at the bottom of the cabinet cavity, the crushed materials falling from the longitudinal material port can be received and guided to the receiving box for centralized collection to avoid accumulation and blockage, thereby improving the convenience of use. The application of the heating plate on the inclined guide platform provides an opportunity for preliminary drying of the wet crushed materials. By adjusting the heating power through the temperature control system, the evaporation of the water content of the crushed materials can be accelerated, reducing the difficulty and cost of subsequent processing. It can also promote the decomposition and volatilization of harmful gases during the heating process, reducing the potential risk of environmental pollution.

[0028] Therefore, the present invention not only solves the deficiencies of the traditional air supply cabinet in terms of debris collection and air flow space adjustment, but also effectively improves the overall air supply effect and use effect of the air supply cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0030] Figure 1 It is a structural schematic diagram of the present invention;

[0031] Figure 2 It is a schematic diagram of the rear structure of the present invention;

[0032] Figure 3 It is a schematic diagram of the structure inside the experimental cabinet of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the fill light board of the present invention in use state;

[0034] Figure 5 This is a structural schematic diagram of another usage state of the fill light board of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the driving mechanism and the moving plate of the present invention;

[0036] Figure 7 It is a schematic diagram of the connection structure between the elastic movable sheet and the movable plate of the present invention;

[0037] Figure 8 It is a structural schematic diagram of the inclined guide platform and the movable plate of the present invention;

[0038] Fig. 9 It is a schematic diagram of the connection structure between the movable plate and the slot of the present invention;

[0039] Fig.10 It is a structural schematic diagram of the movable plate of the present invention;

[0040] Fig.11 It is a schematic diagram of the structure of the air duct and the elastic movable sheet of the present invention;

[0041] Fig.12It is a structural schematic diagram of the elastic movable sheet of the present invention;

[0042] In the figure: experimental cabinet 1, control box 2, front panel 21, negative pressure air hole 22, window 3, horizontal plate 31, longitudinal material port 32, movable plate 33, slot 34, first spring 35, vertical plate 36, second spring 37, cabinet cavity 4, movable plate 41, fill light board 42, mounting hole 43, telescopic push rod 44, rear cabinet box 5, material receiving box 51, material inlet 52, air duct 6, fan 61, sound insulation pad 62, negative pressure bucket 7. Negative pressure baffle 71, rectangular sliding groove 72, material guide groove 73, driving mechanism 8, screw 81, driving motor 82, guide rod 83, inclined guide platform 9, heating plate 91, movable vertical rod 10, rectangular sliding rod 101, elastic movable sheet 11, elastic film 111, outer support frame 112, inner rotating shaft 113, outer connecting rod 114, ball head shaft 115, plug rod 116, ball head 117, LED lamp 12. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0044] like Figure 1-12As shown, the present invention provides a technical solution for a low-noise and high-efficiency laboratory air supply cabinet, comprising an experimental cabinet body 1, a cabinet cavity 4, a placement horizontal plate 31 installed in the middle of the cabinet cavity 4, a control box 2 installed at the front end of the experimental cabinet body 1 for controlling all electric control accessories, a window 3 provided at the front side of the experimental cabinet body 1 and connected to the cabinet cavity 4, and a rear cabinet box 5 installed at the rear side of the control box 2, a negative pressure bucket 7 connected to the cabinet cavity 4 is installed in the middle of the rear cabinet box 5, and an air duct 6 connected to the negative pressure bucket 7 is installed at the rear side of the rear cabinet box 5, and a fan 6 is installed inside the air duct 6 1. A layer of sound insulation pad 62 is compounded on the inner side of the air duct 6 to reduce the noise generated by the fan 61 when in use, thereby improving the noise reduction effect of the equipment, and the negative pressure bucket 7 is used to generate a negative pressure suction ventilation effect through the fan 61, and the negative pressure bucket 7 performs suction ventilation in the cabinet cavity 4. A longitudinal material opening 32 is opened in the middle of the horizontal plate 31, and a movable plate 33 is opened and closed in the middle of the longitudinal material opening 32. The cabinet cavity 4 is movably provided with movable plates 41 on both sides, and the cabinet cavity 4 is provided with a driving device for driving the relative movable displacement of the two movable plates 41 at the bottom. Mechanism 8, under the precise control of the driving mechanism 8, the two moving plates 41 can make relative displacement along the set trajectory, which is responsible for precisely controlling the relative movement of the two moving plates 41. Whether it is a scheduled task or an on-demand start, it can respond quickly to ensure efficient and convenient management of crushed materials. A notch is opened in the middle of the front side of the two moving plates 41, and the placement cross plate 31 is adapted to be inserted into the notch, so that the placement cross plate 31 plays a role in sliding and guiding the moving plates 41, and the moving plates 41 play a role in scraping the crushed materials on the placement cross plate 31. The two moving plates When the movable plate 41 is relatively displaced, the movable plate 33 can be pushed to slide and open the longitudinal material opening 32, and at the same time, the crushed materials on the transverse plate 31 can be pushed into the longitudinal material opening 32 for centralized collection, thereby ensuring the cleanliness of the transverse plate 31. Since the movable plate 33 is cleverly arranged in the middle of the longitudinal material opening 32, it is usually kept in a closed state to prevent the invasion of external impurities and protect the safety of the experimental samples. Only when the movable plate 41 is relatively displaced, the movable plate 33 is pushed open, and the movable plate 33 is automatically opened by force, thereby realizing the instant opening of the longitudinal material opening 32 and ensuring the smooth falling of the crushed materials.

[0045] In addition, two elastic movable sheets 11 are rotatably connected to the inner side of the negative pressure bucket 7, and the outer ends of the two elastic movable sheets 11 are respectively connected to the two movable plates 41, that is, one end of the two elastic movable sheets 11 is rotatably connected to the inner wall axis of the negative pressure bucket 7, and the other end is connected to the movable plate 41. As the movable plate 41 moves relative to each other, the elastic movable sheet 11 can make a real-time response due to the effect of elastic deformation and automatically adjust its shape; when the two movable plates 41 approach each other, the two elastic movable sheets 11 are driven to be synchronously retracted, thereby gradually reducing the air flow space between the negative pressure bucket 7 and the cabinet cavity 4, that is, the air flow space between the two movable plates 41 and between the two elastic movable sheets 11 will be reduced with the relative displacement of the movable plate 41. Centralized ventilation can increase the overall wind speed of the air flow space. This fine control of the width of the air flow path can make the airflow more concentrated, accelerate the transportation of polluted gases and debris, greatly improve the air purification efficiency of the air supply cabinet, and help to accurately control the speed and direction of the airflow under different experimental conditions, thereby improving the absorption effect of harmful gases. On the contrary, the movable plate 41 is synchronously displaced outward, and the air flow space between the negative pressure bucket 7 and the cabinet cavity 4 is increased, that is, the air flow space between the two movable plates 41 and the two elastic movable sheets 11 will increase with the displacement of the movable plate 41, and the space is dispersed for ventilation. When it is displaced in the opposite direction to the outermost end, it is used in a conventional ventilation state, which mainly provides a larger experimental operation range.

[0046] The present invention has carried out in-depth optimization for the above technical scheme. A negative pressure baffle plate 71 is installed in the opening cross section of the negative pressure bucket 7. The negative pressure baffle plate 71 can prevent most of the coarse crushed materials from entering the negative pressure bucket 7. A rectangular sliding groove 72 is horizontally opened in the middle of the negative pressure baffle plate. The rectangular sliding groove 72 corresponds to the side where the cross plate 31 is placed to better allow gas to circulate. It can also play the role of sliding and guiding the movable plate 41. One side of the two movable plates 41 are in contact with the outer side surface of the negative pressure baffle plate 71, and the movable plate 41 is installed with a rectangular sliding rod 101 that can slide and insert in the rectangular sliding groove 72, and a movable vertical rod 10 is locked and installed at the end of the rectangular sliding rod 101. One side of the movable vertical rod 10 is in sliding contact with the inner side surface of the negative pressure baffle plate 71. Therefore, the movable plate 41 is linked with the movable vertical rod 10 through the rectangular sliding rod 101, so that the movable plate 41 is accurately connected with the negative pressure baffle plate 71 in the negative pressure bucket 7, which ensures the stability of the movable plate 41 during the movement and avoids the performance degradation caused by position offset.

[0047] The close contact between the movable vertical rod 10 and the inner side of the negative pressure baffle 71, coupled with the locking connection between the movable vertical rod 10 and the rectangular sliding rod 101, facilitates installation and sets limits for the movable range of the elastic movable sheet 11, which not only refines the management of the air flow path, but also can quickly respond according to actual needs and adjust the direction and speed of air flow in a timely manner. The outer side of the elastic movable sheet 11 is movably connected to the movable vertical rod 10. When the movable plate 41 moves relatively, the synergistic effect of the movable vertical rod 10 and the elastic movable sheet 11 reduces the entire air flow space, thereby improving the airflow, strengthening the absorption and guidance of the experimental sample gas placed on the horizontal plate 31, so that it can be sucked away by the air duct 6 more quickly and smoothly, and the debris falls into the collection from the longitudinal material port 32, which is conducive to improving the air purification capacity and debris management efficiency of the air supply cabinet, and provides strong support for the continuous optimization of the laboratory environment.

[0048] In order to ensure the efficient execution and long-term stability of dynamic air flow space regulation, the elastic movable sheet 11 in the present invention adopts a unique structural design. The specific details are that the elastic movable sheet 11 includes an elastic film 111 and an outer support frame 112 interlaced around the outer edge of the elastic film 111. One end of the outer support frame 112 is universally connected to the movable vertical rod 10, and the other end is rotatably connected to the rear port of the negative pressure bucket 7. The elastic film 111 is made of high-quality elastic rubber or silicone material, and has excellent deformation resilience and durability. The upper and lower sides of the elastic film 111 are always in adjacent contact with the upper and lower sides of the inner side of the negative pressure bucket 7 under the support of the outer support frame 112. The front side of the elastic film 111 is locked and connected to the movable vertical rod 10 by screws, and the rear side of the elastic film 111 is locked and connected to the inner side of the negative pressure bucket 7 by screws. The elastic film 111 is tightly fixed to the movable vertical rod 10 and the inner side of the negative pressure bucket 7 by screws, which is not only convenient for disassembly and assembly, but also ensures a firm fit under various working conditions; and the external support frame 112 arranged around the outer edge of the elastic film 111, on the one hand, increases the overall rigidity and shape maintenance ability of the elastic film; on the other hand, through the different connection methods at both ends of the external support frame 112, one end is universally connected to the movable vertical rod 10, and the other end is rotatably connected to the rear port of the negative pressure bucket 7, so that the elastic movable sheet 11 can be stretched, deformed and positioned. Benefiting from the excellent ductility of the elastic film 111 and the supporting effect of the external support frame 112, the upper and lower sides of the elastic film 111 can always maintain adjacent contact with the upper and lower sides of the inner side of the negative pressure bucket 7 without restriction, which can effectively maintain the integrity of the flow channel and reduce air leakage and pressure loss.

[0049] Furthermore, in order to make the elastic movable sheet 11 maintain structural stability and flexibility while bearing dynamic load force, the outer support frame 112 includes an inner rotating shaft rod 113, and the two ends of the inner rotating shaft rod 113 are welded with outer connecting rods 114 outwardly tilted, and the outer connecting rod 114 is slidably and telescopically connected with a ball head shaft rod 115, and one end of the ball head shaft rod 115 is integrally provided with an insertion rod 116, and is slidably inserted into the inner side of the outer connecting rod 114 through the insertion rod 116. The ends of the two ball head shaft rods 115 are universally connected to the upper and lower sides of the movable vertical rod 10 through ball heads 117. This connection method gives the elastic movable sheet 11 the ability to adjust at a larger angle, regardless of The movable plate 41 can adapt to any displacement through the flexible rotation of the ball head 117 to keep the air flow channel unobstructed and intact; and the inner rotating shaft 113, as the core component of the outer support frame 112, mainly allows the elastic movable sheet 11 to rotate around it, and the outer connecting rod 114 and the ball head shaft 115 are used to support the upper and lower sides of the elastic movable sheet 11 to maintain contact with the negative pressure bucket 7, and the ball head shaft 115 is slidably inserted into one side of the outer connecting rod 114 through the insertion rod 116 to achieve a telescopic effect, so that when the elastic film 111 is deformed, the elastic film 111 is allowed to stretch outward appropriately to adapt to the different distances from the negative pressure bucket 7 to the negative pressure baffle 71.

[0050] In this embodiment, the horizontal plate 31, the negative pressure baffle 71 and the front panel 21 are all provided with a plurality of negative pressure pores 22 connected with the cabinet cavity 4. This setting is mainly to allow the entire cabinet cavity 4 to be connected, whether it is the experimental area on the upper side of the horizontal plate 31 or the material receiving area on the lower side of the horizontal plate 31, a corresponding negative pressure adsorption effect can be produced, that is to say, whether in the experimental process or the cleaning process, the gas inside it can be fully absorbed, and the polluted gas in every corner of the experimental area can be more effectively captured, which is not only conducive to improving the air purification speed, but also helps to maintain the steady state of the experimental environment and reduce energy waste; the inner side of the control box 2 is connected to the cabinet cavity 4 below the horizontal plate 31 through the negative pressure pores 22 of the front panel 21, so that when the entire equipment is ventilated, the inner side of the control box 2 can be dissipated synchronously, thereby improving the use effect of the equipment.

[0051] Furthermore, the present invention incorporates a fill light panel 42 that integrates lighting and airflow control. Specifically, the fill light panel 42 is rotatably embedded in the opposite side of the top of the two movable plates 41, and a mounting hole 43 is opened in the middle of the upper side of the movable plate 41. The mounting hole 43 is rotatably connected to a telescopic push rod 44, and the telescopic push rod 44 can be an electric push rod. The telescopic end of the telescopic push rod 44 is rotatably connected to the rear side of the fill light panel 42, and is used to control the fill light panel 42 to rotate and adjust the angle on the opposite side of the movable plate 41, thereby realizing flexible control of the light irradiation angle. Experimenters can adjust the light direction at any time according to actual needs to ensure that every corner can be properly illuminated, effectively improving the experimental efficiency and comfort.

[0052] Moreover, the fill light board 42 can not only provide sufficient lighting, but also act as a physical barrier. When the relative displacement of the movable plate 41 reduces the space for centralized ventilation, the two fill light boards 42 are close to each other and can act as temporary air guide plates, which can assist in adjusting the air flow path in the cabinet cavity. By changing the positions and angles of the two fill light boards 42 so that they are in contact with each other and guiding the direction of the airflow, the air circulation area of ​​the local area at the top of the cabinet cavity 4 can be effectively reduced, thereby achieving fine-tuning of the air flow and direction.

[0053] The bottom of the cabinet 4 is provided with an inclined guide platform 9, which is located just below the horizontal plate 31 and can not only effectively intercept and receive the debris falling from the longitudinal material opening 32 to avoid the occurrence of blockage, but also the lower side of the inclined guide platform 9 is inserted and located on one side of the receiving box 51, and its inclined design allows it to naturally extend to the inside of the receiving box 51 to form a smooth logistics channel. In this way, whether it is the residue of daily experiments or the debris in the cleaning process, it can be guided by the inclined guide platform 9 to fall into the receiving box 51, which greatly simplifies the debris processing process and enhances the convenience of use. In addition, a heating plate 91 is installed on the inclined guide platform 9. The application of the heating plate 91 on the inclined guide platform 9 can accelerate the evaporation of water in the experimental debris through the precise adjustment of the temperature control system. In addition, high temperature treatment helps to decompose harmful gases, reduces the environmental pollution that may be caused by the experimental links, and enhances the safety factor of the experiment.

[0054] In addition, a material guide slot 73 communicating with the negative pressure bucket 7 and the cabinet cavity 4 is transversely opened at the bottom of the negative pressure baffle 71, so that even if some crushed materials enter the negative pressure bucket 7, they can fall downward from the material guide slot 73 onto the inclined guide platform 9 and finally be guided and collected in the material receiving box 51.

[0055] In the above technical scheme, in order to enable the movable plates 41 to move in relative or opposite directions, the driving mechanism 8 includes a screw 81 and a guide rod 83 which respectively penetrate the two movable plates 41 transversely, wherein opposite threads are respectively arranged on both sides of the screw 81 to be threadedly connected with the two movable plates 41, and the experimental cabinet 1 is equipped with a driving motor 82 for driving the screw 81 to rotate. Therefore, by driving the two opposite threads on the screw 81 to rotate through the driving motor 82, the two threads can respectively drive the two movable plates 41 to move in relative or opposite directions. In order to improve the movement stability of the movable plate 41, the movable plate 41 is guided to slide in multiple positions respectively through the guide rod 83, the rectangular sliding groove 72 and the horizontal plate 31.

[0056] Among them, a slot 34 for the movable plate 33 to slide is opened on the left side of the longitudinal material opening 32, and a plurality of first springs 35 are installed in the slot 34 and elastically connected to the movable plate 33, so that the right side of the movable plate 33 is always elastically pressed against the right side of the longitudinal material opening 32 to prevent the material from falling from the longitudinal material opening 32 during the experiment. A vertical plate 36 is installed at the bottom of the right side of the movable plate 33, and a second spring 37 is installed on the right side of the movable plate 33. The second spring 37 has an elastic protection function to prevent the force generated by the movement of the movable plate 41 from being too rigid and causing the extrusion and wear of the movable plate 33, and the elastic force of the second spring 37 is greater than the elastic force of all the first springs 35. The first spring 35 contracts preferentially when the movable plate 33 is pushed, and contacts the second spring 37 when the movable plate 41 is relatively displaced, and pushes the movable plate 41 toward the slot 34 through the second spring 37 to open the longitudinal material opening 32. At this time, the two movable plates 41 can also push and scrape the remaining debris on the horizontal plate 31 into the longitudinal material opening 32, so that it falls into the inclined guide platform 9 and is guided to the receiving box 51 for collection; similarly, when the movable plate 41 is displaced in the opposite direction, the movable plate 41 is separated from the first spring 35, and the movable plate 33 is reset under the elastic action of the first spring 35 and re-tightens the right side of the longitudinal material opening 32 to achieve tight closure.

[0057] The above embodiments show and describe the basic principles and main features of the invention and the advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the invention. Without departing from the spirit and scope of the invention, the invention may have various changes and improvements, which shall fall within the scope of the invention to be protected. The scope of protection of the invention shall be defined by the attached claims and their equivalents.

Claims

1. A low-noise and high-efficiency laboratory air supply cabinet, comprising an experimental cabinet (1), a cabinet cavity (4), an LED lamp (12) arranged at the top of the cabinet cavity (4), a placement horizontal plate (31) arranged in the middle of the cabinet cavity (4), a control box (2) installed at the front end of the experimental cabinet (1) for controlling all electronic control accessories, a window (3) arranged at the front side of the experimental cabinet (1) and communicating with the cabinet cavity (4), and a rear cabinet box (5) installed at the rear side of the control box (2), characterized in that: A negative pressure bucket (7) in communication with the cabinet cavity (4) is installed in the middle of the rear cabinet box (5), and an air duct (6) in communication with the negative pressure bucket (7) is installed on the rear side of the rear cabinet box (5), and a fan (61) is installed inside the air duct (6); A longitudinal material opening (32) is provided in the middle of the placement transverse plate (31), and a movable plate (33) is provided in the middle of the longitudinal material opening (32); Moving plates (41) are movably arranged on both sides of the cabinet cavity (4), and a driving mechanism (8) for driving the relative movable displacement of the two moving plates (41) is provided at the bottom of the cabinet cavity (4); A notch is provided in the middle of the front side of the two movable plates (41), and the placement transverse plate (31) is adapted to be inserted into the notch. When the two movable plates (41) are relatively displaced, the movable plate (33) can be pushed to slide open the longitudinal material opening (32), and at the same time, the crushed materials on the placement transverse plate (31) can be pushed into the longitudinal material opening (32) for centralized collection; The negative pressure bucket (7) is rotatably connected to two elastic movable sheets (11) on the inside, and the outer ends of the two elastic movable sheets (11) are respectively connected to two movable plates (41) so as to follow the relative movement of the two movable plates (41) to gradually concentrate and reduce the space for air flow inside the negative pressure bucket (7) and the cabinet cavity (4).

2. A low-noise and high-efficiency laboratory fume hood according to claim 1, characterized in that: The negative pressure bucket (7) is provided with a negative pressure baffle (71) at the opening cross section, and a rectangular sliding groove (72) is transversely opened in the middle of the negative pressure baffle, the rectangular sliding groove (72) corresponds to the side where the horizontal plate (31) is placed, one side of the two movable plates (41) are in contact with the outer side of the negative pressure baffle (71), and the movable plate (41) is provided with a rectangular sliding rod (101) that can slide through the rectangular sliding groove (72), and a movable vertical rod (10) is locked and installed at the end of the rectangular sliding rod (101), and one side of the movable vertical rod (10) is in sliding contact with the inner side of the negative pressure baffle (71); The upper and lower sides of the two elastic movable sheets (11) are respectively in contact with the inner side of the negative pressure bucket (7), and the outer side of the elastic movable sheet (11) is movably connected to the movable upright rod (10).

3. A low-noise and high-efficiency laboratory fume hood according to claim 2, characterized in that: The elastic movable sheet (11) comprises an elastic film (111) and an outer support frame (112) interlaced around the outer edge of the elastic film (111); one end of the outer support frame (112) is universally movably connected to the movable vertical rod (10), and the other end is rotatably connected to the rear port of the negative pressure bucket (7); the upper and lower sides of the elastic film (111) are always in adjacent contact with the upper and lower sides of the inner side of the negative pressure bucket (7) under the support of the outer support frame (112); the front side of the elastic film (111) is locked and connected to the movable vertical rod (10) by screws, and the rear side of the elastic film (111) is locked and connected to the inner side of the negative pressure bucket (7) by screws.

4. A low-noise and high-efficiency laboratory fume hood according to claim 3, characterized in that: The outer support frame (112) comprises an inner rotating shaft (113), the two ends of the inner rotating shaft (113) are welded with outer connecting rods (114) in an outwardly inclined manner, and the outer connecting rod (114) is slidably and telescopically connected to a ball head shaft (115), one end of the ball head shaft (115) is integrally provided with an insertion rod (116), and is slidably inserted into the inner side of the outer connecting rod (114) through the insertion rod (116), and the two ends of the ball head shaft (115) are respectively universally connected to the upper and lower sides of the movable vertical rod (10) through ball heads (117).

5. A low-noise and high-efficiency laboratory fume hood according to claim 2, characterized in that: The placement horizontal plate (31), the negative pressure baffle plate (71) and the front panel (21) are all provided with a plurality of negative pressure air holes (22) connected to the cabinet cavity (4); the inner side of the control box (2) is connected to the cabinet cavity (4) via the negative pressure air holes (22) of the front panel (21).

6. A low-noise and high-efficiency laboratory fume hood according to claim 1, characterized in that: A fill light board (42) is rotatably embedded and installed on one side of the top of the two movable plates (41), and a mounting hole (43) is provided in the middle of the upper side of the movable plate (41). A telescopic push rod (44) is rotatably connected to the mounting hole (43). The telescopic end of the telescopic push rod (44) is rotatably connected to the rear side of the fill light board (42) for controlling the fill light board (42) to rotate and adjust the angle on the side opposite to the movable plate (41).

7. A low-noise and high-efficiency laboratory fume hood according to claim 3, characterized in that: The elastic film (111) is made of elastic rubber material, a guide slot (73) communicating with the negative pressure bucket (7) and the cabinet cavity (4) is transversely provided at the bottom of the negative pressure baffle (71), and a layer of sound insulation cotton pad (62) is compounded on the inner side of the air duct (6).

8. The low-noise and high-efficiency laboratory fume hood according to claim 1 is characterized in that: A material receiving box (51) is embedded and installed on the rear side of the rear cabinet box (5), and the material receiving box (51) is connected to the inner side of the cabinet cavity (4). An inclined guide platform (9) is installed at the bottom of the cabinet cavity (4), and the inclined guide platform (9) is located directly below the horizontal plate (31). The lower side of the inclined guide platform (9) is inserted into one side of the material receiving box (51), and the inclined guide platform (9) is installed with a heating plate (91).

9. A low-noise and high-efficiency laboratory fume hood according to claim 1, characterized in that: The driving mechanism (8) comprises a screw rod (81) and a guide rod (83) which respectively penetrate the two movable plates (41) transversely, wherein opposite threads are respectively arranged on both sides of the screw rod (81) and are threadedly connected to the two movable plates (41), and the experimental cabinet (1) is equipped with a driving motor (82) for driving the screw rod (81) to rotate.

10. A low-noise and high-efficiency laboratory fume hood according to claim 1, characterized in that: A slot (34) for the movable plate (33) to slide is provided on the left side of the longitudinal material opening (32). A plurality of first springs (35) are installed in the slot (34) and are elastically connected to the movable plate (33), so that the right side of the movable plate (33) is always elastically pressed against the right side of the longitudinal material opening (32). A vertical plate (36) is installed at the bottom of the right side of the movable plate (33), and a second spring (37) is installed on the right side of the movable plate (33). The elastic force of the second spring (37) is greater than the elastic force of the first spring (35). When the movable plate (41) is relatively displaced, the second spring (37) can contact the second spring (37) and push the movable plate (41) to move toward the slot (34) through the first spring (35) to open the longitudinal material opening (32).

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