Laboratory fume hood ventilation device

Abstract

The utility model discloses a laboratory fume hood air interchanger which comprises a fume hood body, a second mounting base fixedly arranged on one side of a first mounting base, first induced draft fans arranged at the two ends of the bottom of the inner wall of a mounting groove, a first guide pipe arranged on one side of the top end of the first mounting base in a penetrating mode, and a second guide pipe arranged on one side of a connecting pipe in a penetrating mode. And air inlet grooves are equidistantly formed in the bottom of the inner wall of the first mounting seat. According to the ventilation cabinet disclosed by the utility model, external air is sucked by the second induced draft fan to enter the connecting pipe, enters the first mounting seat through the second guide pipe, enters the interior of the ventilation cabinet main body through the air inlet groove in the ventilation cabinet main body, and is exhausted into a laboratory; and vitiated air in the laboratory is guided into the mounting groove by starting the first induced draft fan in the second mounting seat and then is exhausted from the air guide pipe through the first guide pipe, and air in the laboratory can be quickly guided in and exhausted through extrusion of fresh air and suction of the first induced draft fan, so that the air exchange efficiency of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory fume hoods, in particular to a laboratory fume hood ventilation device. Background Art

[0002] The most important function of laboratory fume hoods is exhaust. In chemical laboratories, various harmful gases, odors, moisture, and flammable, explosive, and corrosive substances are generated 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 should be used near the pollution source. For closed laboratories, the ventilation device on the top of the fume hood can convert the gas in the laboratory with fresh air from the outside. With the development of science and technology, the functions of the top of the fume hood are gradually increasing, and the structure and function of the ventilation device are also constantly upgraded.

[0003] In the prior art, the main function of the fume hood used in the laboratory is to introduce fresh air from the outside, and to squeeze out the dirty air in the laboratory through the fresh air. When discharging the original air in the laboratory, the general fume hood does not have a guiding structure for auxiliary suction. The laboratory space is large and the air flow is slow, which makes the ordinary ventilation equipment through the fume hood relatively slow during ventilation. After the equipment is turned on, it takes a long time to wait for the air flow exchange, thereby reducing the ventilation efficiency 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 fume hood ventilation device to solve the problems raised in the above background technology.

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

[0006] The rapid ventilation mechanism includes a first mounting seat fixed on the top of the fume hood body, a second mounting seat is fixedly provided on one side of the first mounting seat, a connecting pipe is fixedly provided on the top of the first mounting seat, a mounting pipe is fixedly provided on one end of the connecting pipe, a mounting groove is opened on the top of the second mounting seat, a ventilation plate is inserted through the upper end of the inner wall of the mounting groove, first exhaust fans are arranged at both ends of the bottom of the inner wall of the mounting groove, a first duct is inserted through one side of the top of the first mounting seat, and the inner wall of one end of the first duct is connected to the inner wall of the mounting groove, a second duct is inserted through one side of the connecting pipe, and air inlet grooves are opened at equal distances at the bottom of the inner wall of the first mounting seat.

[0007] In one example, air ducts are inserted through both ends of one side of the mounting tube, and one end of the first conduit and one end of the second conduit pass through the inner walls of both ends of the mounting tube and communicate with the inner walls of the two air ducts.

[0008] In one example, a second induced draft fan is disposed on the inner wall of one of the air ducts, a filter is fixedly disposed on the inner wall of the other air duct, and sealing gaskets are disposed on the nosepieces at one end of the two air ducts.

[0009] In one example, a guide plate is hingedly provided on one side of the top of the fume hood body, and connecting rods are rotatably provided on both sides of the bottom of the guide plate.

[0010] In one example, one end of the two connecting rods is rotatably connected to two sides of the top end of the inner wall of the fume hood body respectively, and one side of the two connecting rods is rotatably provided with a connecting block.

[0011] In one example, an electric telescopic rod is rotatably provided on the other side of the two connecting rods, and the output ends of the two second electric telescopic rods are respectively fixedly connected to one side of the two connecting blocks.

[0012] In one example, a switch panel is fixedly provided on one side of the fume hood body, and the first induced draft fan, the second induced draft fan and the electric telescopic rod are all electrically connected to an external power supply through the switch panel.

[0013] The laboratory fume hood ventilation device proposed by the utility model can bring the following beneficial effects:

[0014] 1. A laboratory fume hood ventilation device, wherein the second induced draft fan in one of the air ducts draws the outside air into the connecting pipe, and enters the first mounting seat through the second duct, enters the interior of the fume hood body through the air inlet slot inside the fume hood, and is discharged into the laboratory. The dirty air in the laboratory is caused to enter the mounting slot through the ventilation plate by starting the first induced draft fan in the second mounting seat, and then passes through the mounting pipe through the first duct and is discharged from another air duct. In this process, the gas in the laboratory can be quickly introduced and discharged through the squeezing of the new air and the attraction of the first induced draft fan, thereby improving the ventilation efficiency of the device.

[0015] 2. This kind of laboratory fume hood ventilation device, when outside air enters through the fume hood main body, starts the electric telescopic rod at the upper end of the connecting rod to make the electric telescopic rod extend and retract, thereby extending or contracting the connecting rod, so that the guide plate rotates on the fume hood, thereby changing the guide angle, so that the flow direction of the incoming airflow can be adjusted to enter downward, making it difficult to be attracted by the first induced draft fan at the upper end and then discharged, so that the incoming and outgoing gases will not interfere with each other, thereby improving the stability of 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 It is a schematic diagram of the overall structure of the quick air exchange mechanism of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the front side of the installation pipe of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the connection between the guide plate and the connecting rod of the utility model.

[0021] In the figure: 1. fume hood body; 2. first mounting seat; 3. second mounting seat; 4. connecting pipe; 5. mounting pipe; 6. mounting slot; 7. ventilation plate; 8. first induced draft fan; 9. first duct; 10. second duct; 11. air inlet slot; 12. air guide pipe; 13. second induced draft fan; 14. filter screen; 15. sealing gasket; 16. guide plate; 17. connecting rod; 18. connecting block; 19. electric telescopic rod. 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 laboratory fume hood ventilation device shown includes a fume hood body 1, and a rapid ventilation mechanism is provided at the upper end of the fume hood body 1;

[0025] The rapid ventilation mechanism includes a first mounting seat 2 fixed on the top of the fume hood body 1, a second mounting seat 3 is fixedly arranged on one side of the first mounting seat 2, a connecting pipe 4 is fixedly arranged on the top of the first mounting seat 2, a mounting pipe 5 is fixedly arranged on one end of the connecting pipe 4, a mounting groove 6 is provided on the top of the second mounting seat 3, a ventilation plate 7 is inserted through the upper end of the inner wall of the mounting groove 6, and a first induced draft fan 8 is provided at both ends of the bottom of the inner wall of the mounting groove 6, a first duct 9 is inserted through one side of the top of the first mounting seat 2, and the inner wall of one end of the first duct 9 is communicated with the inner wall of the mounting groove 6, a second duct 10 is inserted through one side of the connecting pipe 4, an air inlet groove 11 is equidistantly provided at the bottom of the inner wall of the first mounting seat 2, and the inner wall of one end of the second duct 10 passes through the inner wall of the connecting pipe 4 and is communicated with the inner wall of the air inlet groove 11, and at the same time, the first duct 9 and the second duct 10 do not affect each other when guiding air, and when the ventilation equipment is installed, the mounting pipe 5 is close to the front of the interior to play a supporting role;

[0026] Furthermore, air ducts 12 are inserted into both ends of one side of the installation tube 5 , and one end of the first conduit 9 and one end of the second conduit 10 pass through the inner walls of both ends of the installation tube 5 and communicate with the inner walls of the two air ducts 12 .

[0027] A second induced draft fan 13 is provided on the inner wall of one of the air ducts 12, and a filter 14 is fixedly provided on the inner wall of the other air duct 12. A sealing gasket 15 is provided at one end of the two air ducts 12, and the filter 14 is installed in the air duct 12 outside the wall, and can be disassembled and cleaned later;

[0028] Furthermore, a guide plate 16 is hingedly provided on one side of the top of the fume hood body 1 , and connecting rods 17 are rotatably provided on both sides of the bottom of the guide plate 16 .

[0029] One end of the two connecting rods 17 is rotatably connected to the two sides of the top of the inner wall of the fume hood body 1 respectively, and one side of the two connecting rods 17 is rotatably provided with a connecting block 18.

[0030] An electric telescopic rod 19 is rotatably provided on the other side of the two connecting rods 17, and the output ends of the two second electric telescopic rods 19 are fixedly connected to one side of two connecting blocks 18 respectively, and the electric telescopic rod 19 is rotatably connected to one side of the connecting rod 17, and at the same time, the connecting block 18 is rotatably connected to one side of the connecting rod 17. After the output end of the electric telescopic rod 19 is connected to the connecting block 18, no torque is generated during extension and retraction.

[0031] A switch panel is fixedly provided on one side of the fume hood body 1, and the first induced draft fan 8, the second induced draft fan 13 and the electric telescopic rod 19 are all electrically connected to an external power supply through the switch panel.

[0032] Working principle: When using the laboratory fume hood ventilation device in this design, first, the first mounting seat 2 and the second mounting seat 3 need to be installed on the upper end of the fume hood body 1, and the connecting pipe 4 needs to be installed on the upper end of the first mounting seat 2. At the same time, when installing the ventilation equipment, the two air ducts 12 at the upper end are connected to the laboratory wall through the insertion, and the connection area is sealed by the sealing gasket 15. During ventilation, the second induced draft fan 13 in one of the air ducts 12 draws the outside air into the connecting pipe 4, and enters the first mounting seat 2 through the second duct 10, enters the interior of the fume hood body 1 through the air inlet slot 11 inside it, and is discharged into the laboratory, and the dirty air in the laboratory is made to enter the laboratory by starting the first induced draft fan 8 in the second mounting seat 3. It enters the installation groove 6 through the ventilation plate 7, and then passes through the installation pipe 5 through the first conduit 9 and is discharged from another air guide pipe 12. During this process, the gas in the laboratory can be quickly introduced and discharged through the squeezing of the new air and the attraction of the first induced draft fan 8, thereby improving the ventilation efficiency of the device. At the same time, when the outside air enters through the fume hood body 1, the electric telescopic rod 19 at the upper end of the connecting rod 17 is started to make the electric telescopic rod 19 extend and retract, thereby stretching or contracting the connecting rod 17, so that the guide plate 16 rotates on the fume hood, thereby changing the guide angle, so that the flow direction of the incoming airflow can be adjusted to enter downward, so that it is not easy to be attracted by the first induced draft fan 8 at the upper end and then discharged, so that the incoming and outgoing gases will not interfere with each other, thereby improving the stability of the device.

[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 fume hood ventilation device, comprising a fume hood body (1), characterized in that: A quick air exchange mechanism is provided at the upper end of the fume hood body (1); The rapid ventilation mechanism comprises a first mounting seat (2) fixed on the top of the fume hood body (1); a second mounting seat (3) is fixedly provided on one side of the first mounting seat (2); a connecting pipe (4) is fixedly provided on the top of the first mounting seat (2); a mounting pipe (5) is fixedly provided on one end of the connecting pipe (4); a mounting groove (6) is provided on the top of the second mounting seat (3); a ventilation plate (7) is inserted through the upper end of the inner wall of the mounting groove (6); first induced draft fans (8) are provided at both ends of the bottom of the inner wall of the mounting groove (6); a first duct (9) is inserted through one side of the top of the first mounting seat (2); the inner wall of one end of the first duct (9) is connected to the inner wall of the mounting groove (6); a second duct (10) is inserted through one side of the connecting pipe (4); and air inlet grooves (11) are provided at equal distances at the bottom of the inner wall of the first mounting seat (2).

2. A laboratory fume hood ventilation device according to claim 1, characterized in that: Air guide tubes (12) are inserted into both ends of one side of the installation tube (5), and one end of the first conduit (9) and one end of the second conduit (10) pass through the inner walls of both ends of the installation tube (5) and communicate with the inner walls of the two air guide tubes (12).

3. A laboratory fume hood ventilation device according to claim 2, characterized in that: A second induced draft fan (13) is provided on the inner wall of one of the air ducts (12), a filter screen (14) is fixedly provided on the inner wall of the other air duct (12), and a sealing gasket (15) is provided at one end of the two air ducts (12).

4. A laboratory fume hood ventilation device according to claim 1, characterized in that: A guide plate (16) is hingedly provided on one side of the top of the fume hood body (1), and connecting rods (17) are rotatably provided on both sides of the bottom of the guide plate (16).

5. A laboratory fume hood ventilation device according to claim 4, characterized in that: One end of the two connecting rods (17) is rotatably connected to the two sides of the top end of the inner wall of the fume hood body (1), and one side of the two connecting rods (17) is rotatably provided with a connecting block (18).

6. A laboratory fume hood ventilation device according to claim 5, characterized in that: The other sides of the two connecting rods (17) are both rotatably provided with electric telescopic rods (19), and the output ends of the two second electric telescopic rods (19) are respectively fixedly connected to one side of the two connecting blocks (18).

7. A laboratory fume hood ventilation device according to claim 6, characterized in that: A switch panel is fixedly provided on one side of the fume hood body (1), and the first induced draft fan (8), the second induced draft fan (13) and the electric telescopic rod (19) are all electrically connected to an external power supply via the switch panel.

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