Ventilation cabinet

Abstract

The ventilation cabinet comprises an upper cabinet body and a lower cabinet body, a partition plate is fixedly connected to the bottom of the upper cabinet body, an operation window is formed in the side wall of the upper cabinet body, an exhaust cavity is formed in the upper cabinet body, an exhaust device is arranged in the exhaust cavity, a containing groove is formed in the side wall of the top of the operation window, and a ventilation device is arranged in the containing groove. A storage groove is formed in the upper cabinet body, a protective door is slidably connected into the storage groove and matched with the operation window, proximity sensors are arranged at the upper end and the lower end of the side wall of the storage groove, a motor is fixedly connected to the side wall of the top of the upper cabinet body, an output shaft of the motor is fixedly connected with a rotating rod, and two pull ropes are connected to the side wall of the outer ring of the rotating rod in a winding mode. Under the mutual cooperation of the control panel, the motor, the pull rope, the protective door and other components, the protective door can be automatically closed when an experimenter leaves the operation table, so that the experimenter does not need to manually close the protective door, toxic substances are prevented from flowing out, and the protective door is convenient, rapid and high in safety.

Description

Technical Field

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

[0002] Fume hoods are a common equipment in chemical laboratories. They are often needed for experimental research in hospitals, schools, various research institutes and other research places. They can protect the safety of experimenters when conducting chemical experiments or preparing solutions with volatile reagents and other highly polluting and dangerous experiments.

[0003] For example, Chinese patent publication number CN216262605U discloses a fume hood, which relates to the technical field of fume hood devices. The utility model includes a cabinet, an operating panel is installed between the inner walls of the cabinet, and a glass plate assembly is provided above the operating panel, which is slidably arranged between the inner walls of the cabinet; the glass plate assembly includes a rectangular frame, and a glass plate is arranged in the rectangular frame; a cross bar is arranged on one side of the rectangular frame, and an operating handle is also arranged on the cross bar. The utility model solves the problem of not having a protective door in the prior art by providing a push-pull glass plate assembly.

[0004] However, in the above scheme, the protective door is set to prevent the outflow of toxic substances. The experimenter needs to manually close the protective door, which is not convenient for the experimenter to automatically close the protective door when the experimenter leaves the workbench. The experimenter often forgets to close the protective door after the experiment, resulting in the outflow of toxic substances. Utility Model Content

[0005] The utility model provides a fume hood to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A fume hood, comprising an upper cabinet and a lower cabinet, wherein a partition is fixedly connected to the bottom of the upper cabinet, an operation window is provided on the side wall of the upper cabinet, an exhaust chamber is provided in the upper cabinet, an exhaust device is provided in the exhaust chamber, a storage groove is provided on the top side wall of the operation window, a protective door is slidably connected in the storage groove, the protective door is adapted to the operation window, proximity sensors are provided at the upper and lower ends of the side walls of the storage groove, a motor is fixedly connected to the top side wall of the upper cabinet, a rotating rod is fixedly connected to the output shaft of the motor, two pull ropes are wound and connected to the side wall of the outer ring of the rotating rod, the bottoms of the two pull ropes both penetrate the side wall of the upper cabinet and are slidably connected to the upper cabinet, the bottoms of the two pull ropes both extend into the storage groove and are fixedly connected to the side wall of the protective door, one end of the rotating rod is rotatably connected to a fixed plate, the bottom of the fixed plate is fixedly connected to the top side wall of the upper cabinet, a control panel is provided on the side wall of the upper cabinet, and the motor and the two proximity sensors are electrically connected to the control panel.

[0008] As a further improvement of the present technical solution: the lower cabinet body is fixedly connected to the bottom side wall of the partition, the side wall of the lower cabinet body is rotatably connected to two cabinet doors by hinges, handles are fixedly connected to the two cabinet door side walls, a vertical plate is fixedly connected to the lower cabinet body, four base feet are fixedly connected to the bottom side wall of the lower cabinet body, two of which are fixedly connected to the side walls of the base feet, a plurality of springs are fixedly connected to the side wall at the top of the base plate, pedals are fixedly connected to the top of the plurality of springs, a gravity sensor is provided on the top of the base plate, and the gravity sensor is electrically connected to the control panel.

[0009] As a further improvement of the present technical solution: the exhaust device includes two fixing rods, the two fixing rods are fixedly connected to the two side walls of the exhaust cavity, an exhaust fan is fixedly connected between the two fixing rods, an exhaust pipe is fixedly connected to the top side wall of the upper cabinet, the bottom of the exhaust pipe is connected to the exhaust cavity, and the exhaust fan is electrically connected to the control panel.

[0010] As a further improvement of the technical solution: a filter screen is provided on the side wall of the exhaust chamber, and the filter screen is located below the exhaust fan.

[0011] As a further improvement of the technical solution: the surfaces of the two handles are provided with anti-slip patterns.

[0012] As a further improvement of the technical solution: anti-slip pads are provided at the bottom of the four feet.

[0013] Compared with the prior art, the beneficial effect of the utility model is that the protective door can be automatically closed when the experimenter leaves the operating table through the mutual cooperation of the control panel, motor, pull rope, protective door and other components, so that the experimenter does not need to close it manually, thereby preventing the outflow of toxic substances. The device is convenient, fast and safe.

[0014] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. 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:

[0016] Figure 1 This is a front view structural schematic diagram of a fume hood proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the front cross-sectional structure of a fume hood proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the front view of the middle cross-section structure of a fume hood proposed by the utility model;

[0019] Figure 4 The utility model is a schematic diagram of a side cross-sectional structure of a fume hood.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Upper cabinet; 2. Operation window; 3. Partition; 4. Cabinet door; 5. Lower cabinet; 6. Pedal; 7. Bottom plate; 8. Spring; 9. Gravity sensor; 10. Handle; 11. Control panel; 12. Fixed plate; 13. Motor; 14. Pull rope; 15. Exhaust pipe; 16. Rotating rod; 17. Storage slot; 18. Protective door; 19. Vertical plate; 20. Base; 21. Exhaust fan; 22. Fixed rod; 23. Filter; 24. Exhaust chamber; 25. Proximity sensor. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0023] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] See also Figure 1-4 In the embodiment of the utility model, a fume hood includes an upper cabinet 1 and a lower cabinet 5, a partition 3 is fixedly connected to the bottom of the upper cabinet 1, an operation window 2 is opened on the side wall of the upper cabinet 1, an exhaust cavity 24 is opened in the upper cabinet 1, an exhaust device is arranged in the exhaust cavity 24, a storage groove 17 is opened on the top side wall of the operation window 2, a protective door 18 is slidably connected in the storage groove 17, the protective door 18 is adapted to the operation window 2, and proximity sensors 25 are arranged at both ends of the upper and lower sides of the side wall of the storage groove 17, a motor 13 is fixedly connected to the top side wall of the upper cabinet 1, and the motor 13 The output shaft is fixedly connected with a rotating rod 16, and two pull ropes 14 are wound around the side wall of the outer ring of the rotating rod 16. The bottoms of the two pull ropes 14 penetrate the side wall of the upper cabinet 1 and are slidably connected to the upper cabinet 1. The bottoms of the two pull ropes 14 extend into the storage groove 17 and are fixedly connected to the side wall of the protective door 18. One end of the rotating rod 16 is rotatably connected with a fixed plate 12, and the bottom of the fixed plate 12 is fixedly connected to the top side wall of the upper cabinet 1. A control panel 11 is provided on the side wall of the upper cabinet 1, and the motor 13 and the two proximity sensors 25 are electrically connected to the control panel 11.

[0026] See also Figure 1-4 The lower cabinet 5 is fixedly connected to the bottom side wall of the partition 3. The side wall of the lower cabinet 5 is rotatably connected to two cabinet doors 4 through hinges. The side walls of the two cabinet doors 4 are fixedly connected with handles 10. The surfaces of the two handles 10 are provided with anti-slip patterns. A vertical plate 19 is fixedly connected inside the lower cabinet 5. Four feet 20 are fixedly connected to the bottom side wall of the lower cabinet 5. Two of the feet 20 are fixedly connected to the side walls with a bottom plate 7. A plurality of springs 8 are fixedly connected to the top of the bottom plate 7. A pedal 6 is fixedly connected to the top of the plurality of springs 8. A gravity sensor 9 is provided on the top of the bottom plate 7. The gravity sensor 9 is electrically connected to the control panel 11. When the experimenter leaves the pedal 6, the pedal 6 is automatically reset and disengaged from the pressure on the gravity sensor 9 under the action of multiple springs 8. The gravity sensor 9 sends a signal to the control panel 11. The control panel 11 controls the motor 13 to start, and the protective door 18 is lowered through the motor 13. When the protective door 18 moves to the proximity sensor 25 below, the control panel 11 controls the motor 13 to close, thereby automatically closing the operation window 2 without the need for the experimenter to manually close it, thereby preventing the outflow of toxic substances.

[0027] See also Figure 1-4The exhaust device includes two fixed rods 22, which are fixedly connected to the two side walls of the exhaust chamber 24. An exhaust fan 21 is fixedly connected between the two fixed rods 22. An exhaust pipe 15 is fixedly connected to the top side wall of the upper cabinet 1. The bottom of the exhaust pipe 15 is connected to the exhaust chamber 24. The exhaust fan 21 is electrically connected to the control panel 11. The exhaust fan 21 is started by controlling the control panel 11. The exhaust fan 21 can exhaust the harmful gas generated by the experiment, and the gas is discharged through the exhaust pipe 15.

[0028] See also Figure 3-4 A filter screen 23 is disposed on the side wall of the exhaust chamber 24 . The filter screen 23 is located below the exhaust fan 21 , and can prevent some lighter impurities from being sucked into the exhaust chamber 24 , thereby preventing the exhaust fan 21 from being affected.

[0029] See also Figure 1-4 The bottoms of the four feet 20 are all provided with anti-skid pads to increase the friction between the feet 20 and the ground and prevent scratches on some tile floors.

[0030] The working principle of the utility model is as follows: when the experimenter conducts an experiment in the fume hood, the experimenter stands on the pedal 6, and the pedal 6 will squeeze multiple springs 8 and the gravity sensor 9 at the same time when the experimenter steps on it. The gravity sensor 9 sends a signal to the control panel 11, and the control panel 11 controls the motor 13 to start, and the motor 13 drives the rotating rod 16 to rotate. When the rotating rod 16 rotates, the pull rope 14 can be wound up, and the pull rope 14 drives the protective door 18 to move upward, thereby opening the protective door 18. When the protective door 18 moves to the upper proximity sensor 25, the proximity sensor 25 sends a signal to the control panel 11, thereby controlling the motor 13 to close, and then the experimental materials are placed through the operation window 2. When conducting experiments in the upper cabinet 1, the exhaust fan 21 is started by controlling the control panel 11. The exhaust fan 21 can exhaust harmful gases generated by the experiment, and the gases are discharged through the exhaust pipe 15. When the experimenter leaves the pedal 6, the pedal 6 is automatically reset and disengaged from the pressure on the gravity sensor 9 under the action of multiple springs 8. The gravity sensor 9 sends a signal to the control panel 11. The control panel 11 controls the motor 13 to start, and the protective door 18 is lowered by the motor 13. When the protective door 18 moves to the proximity sensor 25 below, the control panel 11 controls the motor 13 to close, thereby automatically closing the operation window 2 without the need for the experimenter to manually close it, thereby preventing the outflow of toxic substances.

[0031] The above description is only a preferred embodiment of the utility model and does not impose any form of limitation on the utility model. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A fume hood, comprising an upper cabinet (1) and a lower cabinet (5), characterized in that: A partition (3) is fixedly connected to the bottom of the upper cabinet (1); an operation window (2) is provided on the side wall of the upper cabinet (1); an exhaust cavity (24) is provided in the upper cabinet (1); an exhaust device is provided in the exhaust cavity (24); a storage groove (17) is provided on the top side wall of the operation window (2); a protective door (18) is slidably connected in the storage groove (17); the protective door (18) is adapted to the operation window (2); proximity sensors (25) are provided at both upper and lower ends of the side wall of the storage groove (17); a motor (13) is fixedly connected to the top side wall of the upper cabinet (1); the output shaft of the motor (13) is fixedly connected to a rotating shaft (24); A rod (16) is provided, wherein two pull ropes (14) are wound around the side wall of the outer ring of the rotating rod (16), the bottoms of the two pull ropes (14) penetrate the side wall of the upper cabinet (1) and are slidably connected to the upper cabinet (1), the bottoms of the two pull ropes (14) extend into the storage groove (17) and are fixedly connected to the side wall of the protective door (18), one end of the rotating rod (16) is rotatably connected to a fixed plate (12), the bottom of the fixed plate (12) is fixedly connected to the top side wall of the upper cabinet (1), a control panel (11) is provided on the side wall of the upper cabinet (1), and the motor (13) and the two proximity sensors (25) are electrically connected to the control panel (11).

2. A fume hood according to claim 1, characterized in that: The lower cabinet (5) is fixedly connected to the bottom side wall of the partition (3); the side wall of the lower cabinet (5) is rotatably connected to two cabinet doors (4) through hinges; handles (10) are fixedly connected to the side walls of the two cabinet doors (4); a vertical plate (19) is fixedly connected inside the lower cabinet (5); four feet (20) are fixedly connected to the bottom side wall of the lower cabinet (5); two of the feet (20) are fixedly connected to the side walls of the bottom of the lower cabinet (5); a plurality of springs (8) are fixedly connected to the top side wall of the bottom plate (7); pedals (6) are fixedly connected to the top of the plurality of springs (8); a gravity sensor (9) is provided at the top of the bottom plate (7); and the gravity sensor (9) is electrically connected to a control panel (11).

3. A fume hood according to claim 1, characterized in that: The exhaust device comprises two fixing rods (22), the two fixing rods (22) are fixedly connected to the two side walls of the exhaust cavity (24), an exhaust fan (21) is fixedly connected between the two fixing rods (22), an exhaust pipe (15) is fixedly connected to the top side wall of the upper cabinet (1), the bottom of the exhaust pipe (15) is connected to the exhaust cavity (24), and the exhaust fan (21) is electrically connected to the control panel (11).

4. A fume hood according to claim 3, characterized in that: A filter screen (23) is provided on the side wall of the exhaust cavity (24), and the filter screen (23) is located below the exhaust fan (21).

5. A fume hood according to claim 2, characterized in that: The surfaces of the two handles (10) are both provided with anti-slip patterns.

6. A fume hood according to claim 2, characterized in that: The bottoms of the four feet (20) are all provided with anti-skid pads.

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