Air guide structure for laboratory fume hood

Abstract

The utility model relates to an air guide structure for a laboratory fume hood. The air guide structure comprises a plurality of air guide assemblies arranged in a hood body of the fume hood. The air guide assembly comprises an air guide plate A and an air guide plate B which are rotationally arranged in the cabinet body, a pull rod A and a pull rod B are hinged to the sides, away from the rotating axis, of the air guide plate A and the air guide plate B respectively, and the pull rod A and the pull rod B are arranged on the cabinet body in a sliding mode in the axial direction of the pull rod A and the pull rod B respectively; a rack A and a rack B which axially extend along the pull rod A and the pull rod B are fixedly connected to the pull rod A and the pull rod B respectively, are oppositely arranged and are in meshed connection with gears; the gear is rotationally arranged on the cabinet body, and a driving mechanism for driving the gear to rotate is arranged on the cabinet body; the gear rotates to drive the rack A and the rack B to move reversely, so that the pull rod A and the pull rod B drive the air deflector A and the air deflector B to rotate reversely, and the air speed in the ventilation cabinet is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of fume hood technology, and in particular to an air guiding structure for laboratory fume hoods. Background Technology

[0002] A fume hood is similar to a sealed enclosure. Small parts spray painting booths and chemical laboratory fume hoods are typical examples of cabinet-type exhaust hoods. One side is completely open, allowing operators to work inside. They are primarily used for painting large parts and bagging powder materials. The working opening of the fume hood significantly affects the airflow distribution within, which in turn directly impacts the effectiveness of the cabinet-type exhaust hood.

[0003] Prior art application number 202322249836.2 discloses a laboratory fume hood air guiding structure, relating to the field of fume hood technology. It includes an air guiding component and an air inlet adjustment component. The top of the air guiding component is fixedly connected to the fume hood, and one side of the fume hood is fixedly connected to the inner side of the air inlet adjustment component. The air guiding component includes an air guide frame, the top of which is fixedly connected to the inner wall of the fume hood. A rotating shaft is rotatably connected to the inner side of the air guide frame, and air guide vanes are movably connected to the end of the rotating shaft. A connecting rod is movably inserted into the interior of the air guide vanes. This invention allows external air to enter the fume hood through the air inlet adjustment component. After the air enters, it ventilates the fume hood along the air guide vanes. When the direction of the airflow needs to be adjusted, simply turn the adjusting screw to rotate the adjusting block. The rotation of the adjusting screw causes a moving block to move on the surface of the guide rod, and the moving block moves up and down following the rotation direction of the adjusting block.

[0004] However, the above technical solutions have some problems: it is difficult to effectively adjust the wind speed through the guide vanes, and although the wind speed can be adjusted if the tilt angle of the guide vanes is too large, it will also cause a serious change in the wind direction. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a simple, efficient, safe, reliable, and easy-to-operate air guiding structure for laboratory fume hoods. This structure utilizes gear rotation to drive racks A and B to move in opposite directions, which in turn drives guide plates A and B to rotate in opposite directions via pull rods A and B, thereby adjusting the airflow speed inside the fume hood.

[0006] This utility model is achieved through the following technical solution: providing an air guiding structure for a laboratory fume hood, including several air guiding components disposed within the fume hood's cabinet body; the air guiding components include air guide plate A and air guide plate B rotatably disposed within the cabinet body, the rotation axes of air guide plate A and air guide plate B forming an angle greater than 0° with the ventilation channel of the fume hood; pull rods A and B are respectively hinged to the side of air guide plate A and air guide plate B away from the rotation axis, and pull rods A and B are respectively along pull rod A and pull rod B. B is axially slidably mounted on the cabinet; racks A and B, extending axially along the pull rods A and B respectively, are fixedly connected to the pull rods A and B, racks A and B are arranged opposite to each other, and racks A and B are meshed with gears; the gears are mounted on the cabinet, and the cabinet is equipped with a drive mechanism to drive the gears to rotate; the rotation of the gears drives racks A and B to move in opposite directions, thereby driving the air guide plates A and B to rotate in opposite directions through the pull rods A and B, thus adjusting the air speed inside the fume hood.

[0007] As an optimization, the rotation axes of air guide plate A and air guide plate B are parallel to each other, the axes of pull rod A and pull rod B are parallel to each other, and the axis of pull rod A is perpendicular to the rotation axis of air guide plate A; a slide rail extending along the axis of pull rod A is fixed on the cabinet, a slider is slidably mounted on the slide rail, and a gear is mounted on the slider; the slider slides on the slide rail to drive pull rod A and pull rod B to move in the same direction, thereby driving air guide plate A and air guide plate B to rotate in the same direction, thus adjusting the direction inside the fume hood.

[0008] As an optimization, the slide rail is provided with several limiting grooves arranged sequentially along the slide rail axis; the slider is provided with a sliding hole extending towards the slide rail, and a guide rod slides through the sliding hole. A limiting block that matches the limiting groove is fixed at the end of the guide rod facing the slide rail, and the end of the guide rod away from the slide rail passes through a return spring and is fixed to the slider through the return spring; the slider is fixed at the designated position on the slide rail by the limiting block and the limiting groove, preventing the air guide plate A and air guide plate B from driving the slider to move under the left and right wind force.

[0009] As an optimization, guide vanes A and B are respectively provided on both sides, extending along the sides of guide vanes A and B. The axis of guide vane A is perpendicular to the rotation axis of guide vane A, and the axis of guide vane B is perpendicular to the rotation axis of guide vane B. Positioning blocks A and B are respectively slidably installed in guide vanes A and B, and guide vanes A and B are mounted on the cabinet via positioning blocks A and B respectively. By rotating positioning blocks A and B and sliding on both sides of guide vanes A and B respectively, the pull rods A and B are prevented from tilting when guide vanes A and B rotate.

[0010] As an optimization, positioning block A extends along the axial direction of slide groove A, and positioning block B extends along the axial direction of slide groove B; to prevent the air guide plate A and air guide plate B from being deviated.

[0011] As an optimization, the two sides of the air guide plate A are fitted to the inner wall of the cabinet through flexible pads A, and the flexible pads A extend along the side of the air guide plate A; the two sides of the air guide plate B are fitted to the inner wall of the cabinet through flexible pads B, and the flexible pads B extend along the side of the air guide plate B; the peak airflow passes through the two sides of the air guide plate A and the air guide plate B through the flexible pads A and B, so as to avoid affecting the working effect of the fume hood.

[0012] The beneficial effects of this utility model are as follows: the rotation of the gear drives racks A and B to move in opposite directions, thereby driving guide plates A and B to rotate in opposite directions via pull rods A and B, thus adjusting the air speed inside the fume hood; the sliding of the slider on the slide rail drives pull rods A and B to move in the same direction, thereby driving guide plates A and B to rotate in the same direction, thus adjusting the airflow inside the fume hood; the limiting block and limiting groove fix the slider at a designated position on the slide rail, preventing guide plates A and B from moving under the influence of the wind; the rotation of positioning blocks A and B and their sliding on both sides of guide plates A and B respectively prevents pull rods A and B from tilting when guide plates A and B rotate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of the present invention (angle 1);

[0014] Figure 2 for Figure 1 A schematic diagram of the structure at point A;

[0015] Figure 3 for Figure 1 A schematic diagram of the structure at point B;

[0016] Figure 4 This is a schematic diagram of the internal structure of this utility model (angle two);

[0017] Figure 5 for Figure 4 A schematic diagram of the structure at point C;

[0018] As shown in the figure:

[0019] 1. Cabinet, 2. Air guide assembly, 3. Pull rod A, 4. Pull rod B, 5. Rack A, 6. Rack B, 7. Gear, 8. Drive mechanism, 9. Slide rail, 10. Slider, 11. Guide rod, 12. Limit block, 13. Return spring, 14. Positioning block A, 15. Positioning block B, 16. Flexible pad A, 17. Flexible pad B, 201. Air guide plate A, 202. Air guide plate B, 901. Limit groove, 2011. Slide groove A, 2021. Slide groove B. Detailed Implementation

[0020] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0021] like Figure 1 , 4 As shown in Figure 5, the air guiding structure for a laboratory fume hood of this utility model includes several air guiding components 2 disposed within the cabinet 1 of the fume hood. Each air guiding component 2 includes an air guiding plate A201 and an air guiding plate B202 mounted within the cabinet 1. The rotation axes of the air guiding plates A201 and B202 form angles greater than 0° with the ventilation channels of the fume hood. A pull rod A3 and a pull rod B4 are respectively hinged to the side of the air guiding plates A201 and B202 away from the rotation axis. The pull rods A3 and B4 are slidably mounted on the cabinet 1 along their axial directions. A rack A5 and a rack B6 extending along the axial directions of the pull rods A3 and B4 are respectively fixed to the pull rods A3 and B4. Racks A5 and B6 are arranged opposite each other and are meshed with gear 7. Gear 7 is mounted on cabinet 1, and cabinet 1 is provided with a drive mechanism 8 for driving gear 7 to rotate. The rotation axes of air guide plates A201 and B202 are perpendicular to the ventilation channel of the fume hood, and a ventilation channel is formed between air guide plates A201 and B202. Two through holes are opened on cabinet 1, and the axes of the two through holes are perpendicular to the rotation axes of air guide plates A201 and B202, respectively. Pull rods A3 and B4 are slidably inserted into the two through holes. Racks A5 and B6 are located on both sides of gear 7. The drive mechanism 8 is existing technology and can be a crank handle.

[0022] Airflow is transmitted within cabinet 1; drive mechanism 8 is activated, which drives gear 7 to rotate. Rack A5 and rack B6 move in opposite directions under the action of gear 7, which in turn drives pull rod A3 and pull rod B4 to move in opposite directions. Pull rod A3 and pull rod B4 drive air guide plate A201 and air guide plate B202 to rotate in opposite directions. The gap between air guide plate A201 and air guide plate B202 changes, and the air speed inside cabinet 1 changes.

[0023] like Figure 1 , 2 The rotation axes of the air guide plate A201 and air guide plate B202 shown in Figure 4 are parallel to each other, the axes of the pull rod A3 and pull rod B4 are parallel to each other, and the axis of the pull rod A3 is perpendicular to the rotation axis of the air guide plate A201; a slide rail 9 extending along the axis of the pull rod A3 is fixed on the cabinet 1, a slider 10 is slidably mounted on the slide rail 9, and the gear 7 is rotated on the slider 10.

[0024] Pushing slider 10 causes it to slide on slide rail 9 and drive pull rods A3 and B4 to move in the same direction via racks A5 and B6. Pull rods A3 and B4 drive air guide plates A201 and B202 to rotate in the same direction. As the tilt angle of air guide plates A201 and B202 changes, the air direction inside cabinet 1 changes.

[0025] like Figure 1 , 2 As shown in Figure 4, the slide rail 9 has several limiting grooves 901 arranged sequentially along the axial direction of the slide rail 9; the slider 10 has a sliding hole extending toward the slide rail 9, and a guide rod 11 slides through the sliding hole. A limiting block 12 adapted to the limiting groove 901 is fixed at one end of the guide rod 11 toward the slide rail 9, and the other end of the guide rod 11 away from the slide rail 9 passes through a return spring 13 and is fixedly connected to the slider 10 through the return spring 13; the sliding hole is perpendicular to the slide rail 9; and several sliding holes with parallel axes are opened on the slider 10.

[0026] Pull the guide rod 11, which slides in the sliding hole and drives the limiting block 12 to move away from the limiting groove 901. The return spring 13 relaxes until the limiting block 12 disengages from the limiting groove 901. Push the slider 10, which slides on the slide rail 9 until it reaches the designated position. Release the guide rod 11, which retracts the return spring 13. Under the action of the return spring 13, the guide rod 11 slides in the sliding hole and drives the limiting block 12 to move towards the limiting groove 901 until the limiting block 12 enters the limiting groove 901 and the slider 10 is engaged on the slide rail 9.

[0027] like Figure 1 and 3 The air guide plates A201 and B202 shown are respectively provided with sliding grooves A2011 and B2021 extending along the sides of the air guide plates A201 and B202. The axis of sliding groove A2011 is perpendicular to the rotation axis of air guide plate A201, and the axis of sliding groove B2021 is perpendicular to the rotation axis of air guide plate B202. Positioning blocks A14 and B15 are respectively slidably installed in sliding grooves A2011 and B2021. Air guide plates A201 and B202 are respectively mounted on the cabinet 1 through positioning blocks A14 and B15.

[0028] When air guide plates A201 and B202 rotate, positioning blocks A14 and B15 rotate under the action of air guide plates A201 and B202 respectively and slide in slide grooves A2011 and B2021 respectively.

[0029] like Figure 1 and 3 Positioning block A14 extends axially along slide groove A2011, and positioning block B15 extends axially along slide groove B2021; to prevent air guide plate A201 and air guide plate B202 from tilting.

[0030] like Figure 1 and 3The air guide plate A201 shown is attached to the inner wall of the cabinet 1 on both sides by flexible pads A16, and the flexible pads A16 extend along the side of the air guide plate A201; the air guide plate B202 is attached to the inner wall of the cabinet 1 on both sides by flexible pads B17, and the flexible pads B17 extend along the side of the air guide plate B202.

[0031] The air guide plate A201 rotates and drives the flexible pad A16 to rotate, and the air guide plate B202 rotates and drives the flexible pad B17 to rotate.

[0032] In actual production, airflow is transmitted within cabinet 1; pulling guide rod 11 causes it to slide within the sliding hole and move limit block 12 away from limit groove 901, causing return spring 13 to relax until limit block 12 disengages from limit groove 901; pushing slider 10 causes it to slide on slide rail 9 until it reaches the designated position; simultaneously, slider 10 slides on slide rail 9 and drives pull rod A3 and pull rod B4 to move in the same direction via rack A5 and rack B6, which in turn drive air guide plate A201 and air guide plate B202 to rotate in the same direction, and positioning blocks A14 and B15 respectively... The air deflector A201 and the air guide plate B202 rotate and slide in the slide grooves A2011 and B2021 respectively. At the same time, the air guide plate A201 rotates and drives the flexible pad A16 to rotate, and the air guide plate B202 rotates and drives the flexible pad B17 to rotate. The tilt angle of the air guide plate A201 and the air guide plate B202 changes, and the air direction in the cabinet 1 changes. When the guide rod 11 is released, the return spring 13 retracts. Under the action of the return spring 13, the guide rod 11 slides in the slide hole and drives the limit block 12 to move toward the limit groove 901 until the limit block 12 enters the limit groove 901 and the slider 10 is engaged on the slide rail 9.

[0033] When the drive mechanism 8 is activated, it drives the gear 7 to rotate. Under the action of the gear 7, racks A5 and B6 move in opposite directions, which in turn drives pull rods A3 and B4 to move in opposite directions. Pull rods A3 and B4 drive the air guide plates A201 and B202 to rotate in opposite directions. Positioning blocks A14 and B15 rotate under the action of air guide plates A201 and B202 respectively and slide in slide grooves A2011 and B2021 respectively. At the same time, air guide plate A201 rotates and drives the flexible pad A16 to rotate, and air guide plate B202 rotates and drives the flexible pad B17 to rotate. The gap between air guide plates A201 and B202 changes, and the air speed inside cabinet 1 changes.

[0034] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. An air guiding structure for a laboratory fume hood, comprising a plurality of air guiding components (2) disposed within the cabinet (1) of the fume hood; characterized in that: The air guide assembly (2) includes an air guide plate A (201) and an air guide plate B (202) mounted inside the cabinet (1). The rotation axes of the air guide plate A (201) and the air guide plate B (202) form an angle greater than 0° with the ventilation channel of the fume hood. A pull rod A (3) and a pull rod B (4) are respectively hinged to the side of the air guide plate A (201) and the air guide plate B (202) away from the rotation axis. The pull rod A (3) and the pull rod B (4) are respectively along the pull rod A (3) and the pull rod B (4). The rod B (4) is slidably mounted on the cabinet (1); racks A (5) and B (6) extending along the axial direction of the rods A (3) and B (4) are respectively fixed on the rods A (3) and B (4), racks A (5) and B (6) are arranged opposite to each other, and racks A (5) and B (6) are meshed with a gear (7); the gear (7) is mounted on the cabinet (1), and the cabinet (1) is provided with a drive mechanism (8) for driving the gear (7) to rotate.

2. The air guiding structure for a laboratory fume hood according to claim 1, characterized in that: The rotation axes of air guide plate A (201) and air guide plate B (202) are parallel to each other, the axes of pull rod A (3) and pull rod B (4) are parallel to each other, and the axis of pull rod A (3) is perpendicular to the rotation axis of air guide plate A (201); a slide rail (9) extending along the axis of pull rod A (3) is fixed on the cabinet (1), a slider (10) is slidably mounted on the slide rail (9), and a gear (7) is mounted on the slider (10).

3. The air guiding structure for a laboratory fume hood according to claim 2, characterized in that: The slide rail (9) has several limiting grooves (901) arranged sequentially along the axial direction of the slide rail (9); the slider (10) has a sliding hole extending toward the slide rail (9), and a guide rod (11) slides through the sliding hole. One end of the guide rod (11) facing the slide rail (9) is fixed with a limiting block (12) that matches the limiting groove (901). The end of the guide rod (11) away from the slide rail (9) passes through a return spring (13) and is fixed to the slider (10) through the return spring (13).

4. The air guiding structure for a laboratory fume hood according to claim 1, characterized in that: On both sides of the air guide plate A (201) and the air guide plate B (202), there are slide grooves A (2011) and slide groove B (2021) extending along the side of the air guide plate A (201) and the air guide plate B (2022), respectively. The axis of slide groove A (2011) is perpendicular to the rotation axis of the air guide plate A (201), and the axis of slide groove B (2021) is perpendicular to the rotation axis of the air guide plate B (202). Positioning blocks A (14) and B (15) are slidably installed in slide grooves A (2011) and B (2021), respectively. The air guide plate A (201) and the air guide plate B (202) are mounted on the cabinet (1) through positioning blocks A (14) and positioning blocks B (15), respectively.

5. The air guiding structure for a laboratory fume hood according to claim 1, characterized in that: Positioning block A (14) extends along the axial direction of slide groove A (2011), and positioning block B (15) extends along the axial direction of slide groove B (2021).

6. The air guiding structure for a laboratory fume hood according to claim 1, characterized in that: The two sides of the air guide plate A (201) are attached to the inner wall of the cabinet (1) through flexible pad A (16), and the flexible pad A (16) extends along the side of the air guide plate A (201); the two sides of the air guide plate B (202) are attached to the inner wall of the cabinet (1) through flexible pad B (17), and the flexible pad B (17) extends along the side of the air guide plate B (202).

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