Laboratory variable air volume fuming cupboard

Abstract

The utility model discloses a laboratory variable air volume fuming cupboard which comprises a fuming cupboard body, limiting grooves are formed in the two sides of the inner wall of a mounting base, a plurality of ventilation grooves are formed in the bottom of the inner wall of the mounting base at equal intervals, two baffles are arranged between the inner walls of the two limiting grooves in a sliding mode, and connecting rods are rotationally arranged between the two sides of the top ends of the two baffles. One end of one connecting rod is rotationally provided with a connecting block, and the other end of one connecting rod is rotationally provided with a hydraulic rod. According to the utility model, the hydraulic rod in the mounting seat is started to stretch and fold the connecting rod, so that the two baffle plates are close to and far away from each other, and the connecting rod at the other ends of the two baffle plates also stretches and shrinks, so that the baffle plates can stably slide in the limiting grooves to adjust the air inlet area of the ventilation groove at the lower end; therefore, the air volume of the fuming cupboard main body is changed, the output power of the driving equipment does not need to be changed, and the service life of the fuming cupboard is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory ventilation, in particular to a variable air volume fume hood for a laboratory. Background Art

[0002] Fume hoods are also called fume hoods. The most important function of fume hoods is exhaust. In chemical laboratories, various harmful gases, odors, moisture, and flammable, explosive, and corrosive substances are produced during experimental operations. In order to protect the safety of users and prevent the spread of pollutants in the experiment to the laboratory, fume hoods must be used near the pollution source. With the development of modern scientific research technology, the use functions of laboratory fume hoods are constantly being improved so that they can better meet the needs of use.

[0003] In view of this, Chinese patent number CN216175192U proposes an intelligent variable air volume laboratory fume hood, which achieves the advantage of adjusting and changing the air volume, so that the laboratory fume hood can adjust the ventilation volume of the fume hood according to actual use needs when in use, thereby improving the intelligent effect of the laboratory fume hood and meeting the use needs of users. However, when using existing laboratory fume hoods, in order to adjust the air volume, the power of the upper fan drive device is usually adjusted. This adjustment method causes the power of the electrical equipment to change continuously, which may easily cause excessive burden on the drive device, or frequent adjustment may easily cause damage, thereby reducing the service life of the device. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a laboratory variable air volume fume hood to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model proposes a laboratory variable air volume fume hood, comprising a fume hood body, wherein a ventilation mechanism capable of adjusting the air volume is arranged at the upper end of the fume hood body;

[0006] The ventilation mechanism with adjustable air volume includes a mounting base fixed on the top of the fume hood body, and limiting grooves are provided on both sides of the inner wall of the mounting base, and a plurality of ventilation grooves are provided at equal distances at the bottom of the inner wall of the mounting base, and the inner wall of each ventilation groove is respectively connected with the interior of the fume hood body, and two baffles are slidably provided between the inner walls of the two limiting grooves, and connecting rods are rotatably provided between the two sides of the top of the two baffles, one end of one of the connecting rods is rotatably provided with a connecting block, and the other end of one of the connecting rods is rotatably provided with a hydraulic rod, and one end of the hydraulic rod is fixedly connected to one side of the connecting block.

[0007] In one example, an air duct is fixedly provided on the top of the mounting seat, and the inner wall of one end of the air duct is connected to the inner wall of the mounting seat, and an air exchanger is provided on the inner wall of the air duct.

[0008] In one example, a connection groove is opened on one side of the top end of the air duct, a support frame is inserted into the inner wall of the connection groove, and the outer wall of the support frame is inserted and connected with the inner wall of the air duct.

[0009] In one example, a dustproof net is fixedly provided on the inner wall of the support frame, and a handle is fixedly provided at the middle position of the top end of the support frame.

[0010] In one example, arc-shaped slots are provided on both sides of the inner wall of the fume hood body, and sliding blocks are slidably provided on the inner walls of the two arc-shaped slots. A guide plate is hingedly provided at the upper edge of one side of the inner wall of the fume hood body.

[0011] In one example, both ends of one side of the guide plate are fixedly connected to one side of two sliders, one side of the outer wall of the two sliders is interspersed with a fixing bolt, and the outer walls of the two fixing bolts are respectively threadedly connected to the inner walls of one side of the two sliders.

[0012] In one example, a switch panel is fixedly provided on one side of the fume hood body, and the fan is electrically connected to an external power supply through the switch panel.

[0013] The variable air volume fume hood for a laboratory proposed by the utility model can bring the following beneficial effects:

[0014] 1. A laboratory variable air volume fume hood. During the air intake and ventilation process of the fume hood main body, the hydraulic rod inside the mounting seat can be started to extend and retract, thereby extending and folding the connecting rod, so that the two baffles are moved closer to and away from each other, and the connecting rods at the other ends of the two baffles are also extended and contracted accordingly, so that the baffles can stably slide in the limit grooves to adjust the air intake area of ​​the lower ventilation grooves. After the air intake area is changed, the air intake and outlet volume can be adjusted, so that the air volume of the fume hood main body is changed, and there is no need to change the output power of the driving device, thereby preventing the driving device from being damaged due to frequent adjustments, thereby improving the service life of the device.

[0015] 2. In this laboratory variable air volume fume hood, while the fume hood main body is exhausting air for ventilation, the fixing bolts on one side of the two sliders are loosened so that the sliders can slide in the arc-shaped slots, and then the inclination of the guide plate is adjusted inside the fume hood main body, so that the direction of the wind flow entering from the upper end can be changed, which is convenient for exhausting air and cooling at different heights of the laboratory, and improves the convenience of using the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure inside the mounting seat of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure inside the air duct of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure inside the main body of the fume hood of the utility model.

[0021] In the figure: 1. Fume hood body; 2. Mounting base; 3. Limiting groove; 4. Ventilation groove; 5. Baffle; 6. Connecting rod; 7. Connecting block; 8. Hydraulic rod; 9. Air duct; 10. Fan; 11. Connecting groove; 12. Support frame; 13. Dust net; 14. Handle; 15. Arc-shaped slot; 16. Slider; 17. Guide plate; 18. Fixing bolt. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the overall concept of the utility model, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0023] The examples are as follows:

[0024] The utility model provides Figure 1-4 A variable air volume fume hood for a laboratory shown in the figure comprises a fume hood body 1, and a ventilation mechanism capable of adjusting the air volume is arranged at the upper end of the fume hood body 1;

[0025] The ventilation mechanism with adjustable air volume comprises a mounting base 2 fixed on the top of the fume hood body 1, and both sides of the inner wall of the mounting base 2 are provided with limit slots 3, and the bottom of the inner wall of the mounting base 2 is provided with a plurality of ventilation slots 4 at equal distances, and the inner wall of each ventilation slot 4 is respectively connected with the inside of the fume hood body 1, and two baffles 5 are slidably provided between the inner walls of the two limit slots 3, and connecting rods 6 are rotatably provided between the two sides of the top of the two baffles 5, and one end of one of the connecting rods 6 is rotatably provided with a connecting block 7, and the other end of one of the connecting rods 6 is rotatably provided with a hydraulic rod 8, and one end of the hydraulic rod 8 is fixedly connected to one side of the connecting block 7, and the two connecting rods 6 are folded and stretched to each other so that the baffle 5 can slide stably in the limit slot 3, and the inlet and outlet air volume of the entire fume hood can be changed by changing the shielding area of ​​the two baffles 5 on the ventilation slot 4, and when the hydraulic rod 8 is extended and retracted, one end rotates with the connecting block 7, and the other end rotates on one side of the connecting rod 6, so that it does not generate torque;

[0026] Furthermore, an air duct 9 is fixedly provided on the top of the mounting base 2 , and the inner wall of one end of the air duct 9 is connected to the inner wall of the mounting base 2 , and an air exchanger 10 is provided on the inner wall of the air duct 9 .

[0027] A connection groove 11 is formed on one side of the top of the air duct 9 , a support frame 12 is inserted through the inner wall of the connection groove 11 , and an outer wall of the support frame 12 is inserted and connected with the inner wall of the air duct 9 .

[0028] A dustproof net 13 is fixedly arranged on the inner wall of the support frame 12, and a handle 14 is fixedly arranged at the middle position of the top of the support frame 12. The dustproof net 13 at the upper end can be cleaned by taking the support frame 12 out of the connecting groove 11 through the handle 14, and then the support frame 12 can be inserted into the connecting groove 11 for dust filtering, which is also convenient for cleaning and avoids blockage of air intake;

[0029] Furthermore, arc-shaped slots 15 are provided on both sides of the inner wall of the fume hood body 1 , and sliders 16 are slidably provided on the inner walls of the two arc-shaped slots 15 . A guide plate 17 is hingedly provided at the upper edge of one side of the inner wall of the fume hood body 1 .

[0030] The two ends of one side of the guide plate 17 are fixedly connected to one side of the two sliders 16 respectively, and a fixing bolt 18 is inserted into one side of the outer wall of the two sliders 16, and the outer walls of the two fixing bolts 18 are respectively threadedly connected to the inner wall of one side of the two sliders 16. By sliding the slider 16 in the arc-shaped slot 15, the inclination of the guide plate 17 can be changed, and the outlet angle of the upper wind flow at the lower end can be changed.

[0031] A switch panel is fixedly provided on one side of the fume hood body 1, and the fan 10 is electrically connected to an external power supply through the switch panel.

[0032] Working principle: When using the laboratory variable air volume fume hood in this design, after the fume hood body 1 is installed in the specified position, the air duct 9 at its upper end is installed at its upper end, and the air duct 9 is passed through the outside of the laboratory to facilitate air intake. During the air intake and ventilation process of the fume hood body 1, the hydraulic rod 8 inside the mounting seat 2 can be started to extend and retract, and then the connecting rod 6 can be extended and folded, so that the two baffles 5 are close to and away from each other, and the connecting rod 6 at the other end of the two baffles 5 also extends and contracts accordingly, so that the baffle 5 can stably slide in the limiting groove 3 to adjust the air intake area of ​​the lower ventilation slot 4. After the air intake area, etc. are changed, the inlet and outlet air volume can be adjusted so that the ventilation The air volume of the fume hood body 1 is changed without changing the output power of the driving device, which prevents damage to the driving device due to frequent adjustments, thereby improving the service life of the device. When the fume hood body 1 is exhausting air for ventilation, the fixing bolts 18 on one side of the two sliders 16 are loosened, so that the sliders 16 can slide in the arc-shaped slots 15, and then the inclination of the guide plate 17 is adjusted inside the fume hood body 1, so that the direction of the wind flow entering from the upper end can be changed, which is convenient for exhausting air and cooling at different heights of the laboratory, and improves the convenience of using the device. After the inclination of the guide plate 17 is adjusted, the fixing bolts 18 can be tightened to fix the slider 16 so that it will not move again.

[0033] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0034] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A laboratory variable air volume fume hood, comprising a fume hood body (1), characterized in that: The upper end of the fume hood body (1) is provided with a ventilation mechanism capable of adjusting the air volume; The ventilation mechanism with adjustable air volume comprises a mounting seat (2) fixed on the top of the fume hood body (1), both sides of the inner wall of the mounting seat (2) are provided with limit grooves (3), the bottom of the inner wall of the mounting seat (2) is provided with a plurality of ventilation grooves (4) at equal distances, and the inner wall of each ventilation groove (4) is respectively connected with the inside of the fume hood body (1), two baffles (5) are slidably provided between the inner walls of the two limit grooves (3), connecting rods (6) are rotatably provided between the two sides of the top of the two baffles (5), one end of one of the connecting rods (6) is rotatably provided with a connecting block (7), the other end of one of the connecting rods (6) is rotatably provided with a hydraulic rod (8), and one end of the hydraulic rod (8) is fixedly connected to one side of the connecting block (7).

2. A laboratory variable air volume fume hood according to claim 1, characterized in that: An air duct (9) is fixedly provided at the top of the mounting seat (2), and the inner wall of one end of the air duct (9) is connected to the inner wall of the mounting seat (2), and an air exchanger (10) is provided on the inner wall of the air duct (9).

3. A laboratory variable air volume fume hood according to claim 2, characterized in that: A connection groove (11) is provided on one side of the top end of the air duct (9), a support frame (12) is inserted through the inner wall of the connection groove (11), and the outer wall of the support frame (12) is inserted and connected to the inner wall of the air duct (9).

4. A laboratory variable air volume fume hood according to claim 3, characterized in that: A dustproof net (13) is fixedly provided on the inner wall of the support frame (12), and a handle (14) is fixedly provided at the middle position of the top end of the support frame (12).

5. A laboratory variable air volume fume hood according to claim 1, characterized in that: Arc-shaped slots (15) are provided on both sides of the inner wall of the fume hood body (1), and sliding blocks (16) are slidably provided on the inner walls of the two arc-shaped slots (15). A guide plate (17) is hingedly provided at the upper edge of one side of the inner wall of the fume hood body (1).

6. A laboratory variable air volume fume hood according to claim 5, characterized in that: The two ends of one side of the guide plate (17) are respectively fixedly connected to one side of the two sliders (16); one side of the outer wall of the two sliders (16) is provided with a fixing bolt (18) inserted therethrough, and the outer walls of the two fixing bolts (18) are respectively threadedly connected to the inner walls of one side of the two sliders (16).

7. A laboratory variable air volume fume hood according to claim 2, characterized in that: A switch panel is fixedly provided on one side of the fume hood body (1), and the fan (10) is electrically connected to an external power supply via the switch panel.

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