Laboratory fume hood air guide structure

Abstract

The utility model discloses a laboratory fume hood air guide structure which comprises a fume hood body, a ventilation cavity is formed in the middle of the fume hood body, an air supplement machine is fixedly connected to the position, close to the outside, of the inner bottom of the ventilation cavity, a linear motor is fixedly connected to one side of the outer end of the ventilation cavity, and a limiting frame is fixedly connected to the other side of the outer end of the ventilation cavity. A fixed glass plate is fixedly connected to the position, close to the top, of the limiting frame, and a movable glass plate is arranged between the linear motor and the limiting frame. Through mutual cooperation of the ventilation cavity, the guide plate, the air supplement machine and the air gathering barrel, when the discharge capacity of experimental gas is small, under the limiting effect of the guide plate, the discharge range of the experimental gas is conveniently reduced, the attachment range of impurities on the air guide plate is concentrated in the middle, cleaning by workers is facilitated, and the working efficiency is improved. And the range of the gas exhaust port can be automatically adjusted, so that the exhaust requirement when the experimental gas displacement is relatively large can be conveniently met.

Description

Technical Field

[0001] The utility model relates to the technical field of fume hoods, in particular to an air guiding structure for a laboratory fume hood. Background Art

[0002] A laboratory fume hood is a professional device used in laboratories, mainly for discharging harmful gases, vapors or other harmful substances generated during experiments. A laboratory fume hood is an indispensable device in the laboratory. Through effective ventilation and control systems, it ensures the health and safety of experimental personnel, optimizes the experimental environment, and improves work efficiency.

[0003] Currently, when the existing laboratory fume hoods are in use, most of the air guiding plates are fixedly arranged. When the gases generated during experiments pass through the guiding of the air guiding plates for a long time, impurities are likely to adhere to the surface of the air guiding plates. This makes it necessary for the staff to clean a larger area when cleaning the air guiding plates, thus increasing the cleaning difficulty. Summary of the Utility Model

[0004] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract of the specification and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract of the specification and the title of the utility model. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0005] To solve the above technical problems, according to one aspect of the utility model, the following technical solutions are provided:

[0006] An air guiding structure for a laboratory fume hood, including a fume hood body. A ventilation chamber is arranged in the middle of the fume hood body. A make-up air fan is fixedly connected to the bottom of the ventilation chamber near the outside. A linear motor is fixedly connected to one side of the outer end of the ventilation chamber. A limit frame is fixedly connected to the other side of the outer end of the ventilation chamber. A fixed glass plate is fixedly connected to the limit frame near the top. An activity glass plate is arranged between the linear motor and the limit frame. First air guiding plates, second air guiding plates and third air guiding plates are fixedly connected to both sides of the inner wall of the ventilation chamber in sequence from bottom to top. Air ducts are arranged between the top of the first air guiding plate and the second air guiding plate, and between the second air guiding plate and the third air guiding plate.

[0007] Two guiding plates are connected to the inner wall of the ventilation chamber by bearings. Hairspring springs are arranged outside the central rotating shafts of the two guiding plates. An activity door is arranged on one side of the fume hood body near the top. An exhaust pipe is fixedly connected to the top of the fume hood body. An air collecting cylinder corresponding to the exhaust pipe is arranged at the top of the ventilation chamber.

[0008] As a preferred embodiment of the air guiding structure of a laboratory fume hood according to the present utility model, wherein the driving end of the linear motor is fixedly connected to one side of the movable glass plate, a chute corresponding to the movable glass plate is provided on one side of the limiting frame close to the linear motor, the movable glass plate is slidably connected to the chute in the limiting frame, and the movable glass plate is driven by the linear motor to rise and fall. When it rises, it coincides with the fixed glass plate. At this time, the operable area of the outer port of the ventilation cavity increases, which is convenient for cleaning the equipment in the ventilation cavity. When the movable glass plate descends, it is convenient to close the ventilation cavity to reduce the escape of experimental gases and facilitate the fume hood to better discharge the experimental gases.

[0009] As a preferred embodiment of the air guiding structure of a laboratory fume hood according to the present utility model, wherein an arc-shaped plate is provided at a corner on the bottom of the ventilation cavity far from the air supply fan, which is convenient for the airflow ejected by the air supply fan to rise along the inner wall of the ventilation cavity after contacting the arc-shaped plate, thereby increasing the flow rate of the experimental gases.

[0010] As a preferred embodiment of the air guiding structure of a laboratory fume hood according to the present utility model, wherein one end of the hairspring is fixedly connected to the guiding plate, and the other end of the hairspring is fixedly connected to the inner wall of the ventilation cavity, which is convenient for driving the guiding plate to automatically reset.

[0011] As a preferred embodiment of the air guiding structure of a laboratory fume hood according to the present utility model, wherein the guiding plate corresponds to the positions of the first air guiding plate and the second air guiding plate, and the bottoms of the two guiding plates abut against both sides of the inner wall of the ventilation cavity. In the initial state, under the action of the hairspring, the two guiding plates are designed in a V-shaped manner. At this time, it is convenient for the airflow to concentrate and pass through the middle of the air guiding plate, reducing the size of the gas discharge passage, so that the pollution of the air guiding plate only exists in the middle, thereby reducing the pollution of the air guiding plate and narrowing the cleaning range.

[0012] When the discharge of the experimental gases increases, under the action of the wind force, it is convenient to drive the guiding plate to rotate. When the guiding plate is in a vertical state, the gas discharge passage is maximized, and at this time, it is convenient for the experimental gases to be better discharged. During this period, no operation by the staff is required, and it can be adjusted adaptively.

[0013] As a preferred embodiment of the air guiding structure of a laboratory fume hood according to the present utility model, wherein sliding rails are fixedly connected to both sides of the inner wall of the ventilation cavity near the top, both ends of the air gathering cylinder are slidably connected to the tops of the two sliding rails, and the bottom of the movable door is connected to the fume hood body through a spring hinge. When the movable door is opened, it is convenient to pull out the air gathering cylinder for cleaning.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] The utility model cooperates among a ventilation cavity, a guide plate, a make-up air fan and a wind collecting cylinder. When the displacement of the experimental gas is small, under the limiting action of the guide plate, it is convenient to narrow the discharge range of the experimental gas, so that the impurity adhesion range on the air guide plate is concentrated in the middle, which is convenient for the staff to clean. Also, it can automatically adjust the range of the gas discharge port to facilitate meeting the discharge requirements when the displacement of the experimental gas is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the present utility model will be described in detail below in conjunction with the drawings and specific embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0017] Figure 1 is a perspective view of a wind guiding structure of a laboratory fume hood according to the present utility model;

[0018] Figure 2 is a schematic structural view of a guide plate of a wind guiding structure of a laboratory fume hood according to the present utility model;

[0019] Figure 3 is a schematic structural view of a wind collecting cylinder of a wind guiding structure of a laboratory fume hood according to the present utility model.

[0020] Legend: 1. Ventilation cabinet body; 2. Ventilation cavity; 3. Make-up air fan; 4. Linear motor; 5. Limiting frame; 6. Fixed glass plate; 7. Movable glass plate; 8. First air guide plate; 9. Second air guide plate; 10. Third air guide plate; 11. Arc plate; 12. Guide plate; 13. Hairspring; 14. Movable door; 15. Exhaust pipe; 16. Wind collecting cylinder; 17. Slide rail; 18. Air duct. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the specific embodiments of the present utility model will be described in detail below in conjunction with the drawings.

[0022] Secondly, the present utility model will be described in detail with reference to the schematic diagrams. When describing the embodiments of the present utility model in detail, for the convenience of description, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples, which should not limit the protection scope of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0023] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below in conjunction with the drawings.

[0024] Please refer to Figures 1 - 3 Figures 1 - 3 , the utility model provides a wind guiding structure for a laboratory fume hood, which includes a fume hood body 1. A ventilation cavity 2 is arranged in the middle of the fume hood body 1, and a makeup air fan 3 is fixedly connected to the bottom inside the ventilation cavity 2 near the outside. Among them, an arc-shaped plate 11 is arranged at the corner on one side of the bottom inside the ventilation cavity 2 away from the makeup air fan 3, which is convenient for the airflow ejected by the makeup air fan 3 to rise along the inner wall of the ventilation cavity 2 after contacting the arc-shaped plate 11, and improves the flow rate of the experimental gas.

[0025] A linear motor 4 is fixedly connected to one side of the outer end of the ventilation cavity 2, a limiting frame 5 is fixedly connected to the other side of the outer end of the ventilation cavity 2, a fixed glass plate 6 is fixedly connected to the limiting frame 5 near the top, and a movable glass plate 7 is arranged between the linear motor 4 and the limiting frame 5.

[0026] The driving end of the linear motor 4 is fixedly connected to one side of the movable glass plate 7. A chute corresponding to the movable glass plate 7 is opened on the side of the limiting frame 5 close to the linear motor 4, and the movable glass plate 7 is slidably connected to the chute inside the limiting frame 5. The linear motor 4 drives the movable glass plate 7 to lift. When it rises, it coincides with the fixed glass plate 6. At this time, the operable area of the outer port of the ventilation cavity 2 increases, which is convenient for cleaning the equipment and the like inside the ventilation cavity 2. When the movable glass plate 7 descends, it is convenient to close the ventilation cavity 2 to reduce the escape of experimental gas and facilitate the fume hood to better discharge the experimental gas.

[0027] First air guiding plates 8, second air guiding plates 9 and third air guiding plates 10 are fixedly connected to both sides of the inner wall of the ventilation cavity 2 in sequence from bottom to top. Air ducts 18 are arranged between the top of the first air guiding plate 8 and the second air guiding plate 9 and between the second air guiding plate 9 and the third air guiding plate 10.

[0028] Two guiding plates 12 are connected to the inner wall of the ventilation cavity 2 by bearings. Hairspring 13 is arranged outside the central rotating shafts of the two guiding plates 12. One end of the hairspring 13 is fixedly connected to the guiding plate 12, and the other end of the hairspring 13 is fixedly connected to the inner wall of the ventilation cavity 2, which is convenient for driving the guiding plate 12 to automatically reset.

[0029] The guiding plates 12 correspond to the positions of the first air guiding plate 8 and the second air guiding plate 9. The bottoms of the two guiding plates 12 are abutted against both sides of the inner wall of the ventilation cavity 2. In the initial state, under the action of the hairspring 13, the two guiding plates 12 are designed in a V shape. At this time, it is convenient for the airflow to concentrate and pass through the middle of the air guiding plate, reducing the size of the gas discharge passage, so that the pollution of the air guiding plate only exists in the middle, thereby reducing the pollution of the air guiding plate and narrowing the cleaning range.

[0030] When the displacement of the experimental gas increases, it is easy to drive the guide plate 12 to rotate under the action of wind. When the guide plate 12 is in a vertical state, the gas discharge passage is maximized, and at this time, it is convenient for the experimental gas to be discharged better. During this period, no operation by the staff is required, and it can be adjusted adaptively.

[0031] An activity door 14 is provided near the top on one side of the ventilation cabinet body 1. A discharge air pipe 15 is fixedly connected to the outer top of the ventilation cabinet body 1. A wind collecting cylinder 16 corresponding to the discharge air pipe 15 is provided at the top of the ventilation cavity 2. Slide rails 17 are fixedly connected to both sides of the inner wall of the ventilation cavity 2 near the top. Both ends of the wind collecting cylinder 16 are slidably connected to the tops of the two slide rails 17. The bottom of the activity door 14 is connected to the ventilation cabinet body 1 through a spring hinge. When the activity door 14 is opened, it is convenient to draw out the wind collecting cylinder 16 for cleaning.

[0032] During use, when the air volume of the experimental gas is small, through the air duct 18 between the first guide vane 8, the second guide vane 9 and the third guide vane 10, when entering the guide vane from the air duct 18, it is exhausted through the area between the two guide plates 12, which is convenient for discharging the experimental gas.

[0033] When the amount of the experimental gas is large, the air supply fan 3 is started, and gas is ejected through the air supply fan 3 to assist the ventilation cabinet body 1 to better discharge harmful gases. When the air flow runs to the arc-shaped plate 11, it moves upward along the outer arc wall thereof. After being impacted by a faster air flow, the two guide plates 12 gradually squeeze the clockwork spring 13 from the shape of an inverted V, and the guide plate 12 presents a vertical state.

[0034] At this time, the air duct 18 in the peripheral area of the guide vane is fully opened, and the flow area for the gas to pass through reaches the maximum at this time, which is convenient for better discharging the experimental gas. The experimental gas enters the wind collecting cylinder 16 through the guide vane and is finally discharged from the discharge air pipe 15.

[0035] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention can be combined with each other in any way. The exhaustive description of these combinations is not given in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A wind guiding structure for a laboratory fume hood, comprising a fume hood body (1), characterized in that, A ventilation cabinet body (1) is provided with a ventilation cavity (2) in the middle. A make-up air fan (3) is fixedly connected to the inner bottom of the ventilation cavity (2) near the outside. A linear motor (4) is fixedly connected to one side of the outer end of the ventilation cavity (2). A limiting frame (5) is fixedly connected to the other side of the outer end of the ventilation cavity (2). A fixed glass plate (6) is fixedly connected to the limiting frame (5) near the top. A movable glass plate (7) is arranged between the linear motor (4) and the limiting frame (5). First air guide plates (8), second air guide plates (9), and third air guide plates (10) are fixedly connected to both sides of the inner wall of the ventilation cavity (2) in sequence from bottom to top. Air ducts (18) are arranged between the top of the first air guide plate (8) and the second air guide plate (9) and between the second air guide plate (9) and the third air guide plate (10); Two guide plates (12) are connected to the inner wall of the ventilation cavity (2) by bearings. A clockwork spring (13) is arranged outside the central rotating shafts of the two guide plates (12). A movable door (14) is arranged at one side of the ventilation cabinet body (1) near the top. An exhaust duct (15) is fixedly connected to the outer top of the ventilation cabinet body (1). A wind collecting cylinder (16) corresponding to the exhaust duct (15) is arranged at the top of the ventilation cavity (2).

2. The air guiding structure of a laboratory fume hood according to claim 1, wherein The driving end of the linear motor (4) is fixedly connected to one side of the movable glass plate (7). A sliding groove corresponding to the movable glass plate (7) is formed in one side of the limiting frame (5) close to the linear motor (4). The movable glass plate (7) is slidably connected to the sliding groove in the limiting frame (5).

3. The air guiding structure of a laboratory fume hood according to claim 1, wherein, An arc-shaped plate (11) is arranged at the corner of the inner bottom of the ventilation cavity (2) far from the make-up air fan (3).

4. The air guiding structure of a laboratory fume hood according to claim 1, characterized in that, One end of the clockwork spring (13) is fixedly connected to the guide plate (12), and the other end of the clockwork spring (13) is fixedly connected to the inner wall of the ventilation cavity (2).

5. The air guiding structure of a laboratory fume hood according to claim 1, characterized in that, The guide plates (12) correspond to the positions of the first air guide plate (8) and the second air guide plate (9). The bottom ends of the two guide plates (12) abut against both sides of the inner wall of the ventilation cavity (2).

6. The air guiding structure of a laboratory fume hood according to claim 1, characterized in that, Sliding rails (17) are fixedly connected to both sides of the inner wall of the ventilation cavity (2) near the top. Both ends of the wind collecting cylinder (16) are slidably connected to the tops of the two sliding rails (17).

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