Fume hood exhaust device

Abstract

The utility model discloses a fume hood exhaust device relates to fume hood exhaust technical field, and the utility model discloses a fume hood, the side of fume hood is installed with the air draft equipment casing, is installed with the filter subassembly on the air draft equipment casing, one side of fume hood is equipped with the frame body, the air draft equipment casing with frame body all is equipped with mounting assembly, one side of air draft equipment casing is equipped with the exhaust pipe, the mounting assembly includes the fixed frame, the fixed frame fixedly covers and is equipped with the outside surface of air draft equipment casing, the utility model discloses can be moved to the end of spacing board by the pull -out plate pull -out spacing board to the cylinder, can make the fixed frame of outside surface of air draft equipment casing cover and set into the frame body after, after the pull -out plate is loosened, with the force of spring can make spacing board insert into the jack, thereby convenient for the air draft equipment casing to dismantle, the equipment in its inside is maintained.

Description

Technical Field

[0001] This utility model relates to the field of fume hood exhaust technology, specifically a fume hood exhaust device. Background Technology

[0002] With the continuous development of modern society and the continuous improvement of economic level, the domestic education cause is also gradually developing. In the process of modern education development, the chemistry laboratory, as a demonstration place in modern chemical teaching, uses a fume hood as a ventilation and storage device installed at the bottom of the laboratory table. Its main function is to provide storage space for the chemicals stored inside and ensure that the chemicals are always under ventilation conditions, thereby ensuring the stability of the chemicals. Among the components of the existing fume hood, the exhaust device, as an essential component that extracts the gas inside the fume hood and discharges the gas to the external environment, plays a crucial role in the composition of the fume hood.

[0003] Application number "CN201921582811.1" discloses a lower cabinet exhaust device for a fume hood, comprising an exhaust duct located at the back of the lower cabinet and communicating with the interior of the lower cabinet; one end of the exhaust duct is connected to the lower cabinet, and the other end is connected to an exhaust pipe, the other end of which is located on the outside of the fume hood and connected to an exhaust fan; an air inlet gap is provided on the lower cabinet. By extracting the gas from the lower cabinet, the gas inside the lower cabinet is kept flowing, so that when the user opens the lower cabinet door, no reagent gas will rush out. However, the above-mentioned equipment still has some problems in use: because the exhaust device of the fume hood is welded to the exhaust port of the fume hood, it is inconvenient to carry out internal maintenance after long-term use. In addition, because the above-mentioned equipment lacks filter auxiliary components, it is impossible to filter the gas inside the fume hood during the use of the device, resulting in the direct discharge of the loose pharmaceutical gas into the external environment, thereby causing environmental pollution. Utility Model Content

[0004] To address the problems mentioned above, such as the exhaust device of the fume hood being welded to the exhaust port, making internal maintenance inconvenient after long-term use, and the lack of filter auxiliary components in the device preventing filtration of the gas inside the fume hood during use, resulting in the direct release of loose pharmaceutical gases into the external environment and causing environmental pollution, the purpose of this utility model is to provide a fume hood exhaust device.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a fume hood exhaust device, including a fume hood, an exhaust fan housing installed on the side of the fume hood, a filter assembly installed on the exhaust fan housing, a frame fixedly provided on one side of the fume hood, an installation assembly provided on both the exhaust fan housing and the frame, and an exhaust pipe provided on one side of the exhaust fan housing; The installation assembly includes a fixing frame, which is fixedly sleeved on the outer surface of the exhaust fan housing. The upper surface of the fixing frame has an insertion hole. A cylinder is fixedly installed inside the frame. A spring is fixedly installed on the inner surface of the cylinder. A circular plate is fixedly installed at the lower end of the spring. A limiting plate is fixedly installed inside the circular plate. The limiting plate movably passes through the cylinder and the frame. The lower end of the limiting plate is movably inserted into the insertion hole. A first sealing strip is fixedly installed on one side of the fixing frame. A first sealing groove is opened on one side of the fume hood. The first sealing strip is movably fitted with the inner surface of the first sealing groove.

[0006] Preferably, the filter assembly includes a channel formed on the upper surface of the exhaust fan housing. A connecting frame is movably inserted into the channel, and an activated carbon filter plate is fixedly installed within the connecting frame. A fixing plate is fixedly installed on the upper surface of the connecting frame. The fixing plate is movably fitted to the upper surface of the exhaust fan housing. A bolt is threaded into the upper surface of the fixing plate, and the end of the bolt is threaded into the interior of the exhaust fan housing.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model allows the lifting plate to pull the limiting plate upward, so that the end of the limiting plate enters the cylinder. Then, the fixing frame fitted on the outer surface of the exhaust fan housing can enter the frame. After the lifting plate is released, the limiting plate can be inserted into the insertion hole by the force of the spring, thereby facilitating the disassembly of the exhaust fan housing and maintenance of its internal equipment.

[0008] 2. This utility model can introduce air from the fume hood into the fume hood through the air induced draft device inside the fume hood housing. The air can be filtered by the activated carbon filter plate. After the activated carbon filter plate has been used for a period of time, the end of the activated carbon filter plate can be removed from the fume hood housing by rotating the bolt. Then, a new connecting frame with an activated carbon filter plate can be installed with the bolt. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the housing structure of the induced draft device of this utility model.

[0012] Figure 3 This is a schematic diagram of the frame structure of this utility model.

[0013] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0014] Figure 5 This is a schematic diagram of the activated carbon filter plate structure of this utility model.

[0015] Figure 6 This is a schematic diagram of the fixed frame structure of this utility model.

[0016] In the diagram: 1. Fume hood; 2. Exhaust fan housing; 3. Frame; 4. Mounting assembly; 41. Fixing frame; 42. Insertion hole; 43. Cylinder; 44. Spring; 45. Circular plate; 46. Limiting plate; 47. Lifting plate; 48. First sealing groove; 49. First sealing strip; 5. Filter assembly; 51. Through groove; 52. Connecting frame; 53. Activated carbon filter plate; 54. Second sealing strip; 55. Fixing plate; 56. Bolt; 57. Second sealing groove; 6. Exhaust duct. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example: Figure 1-6As shown, this utility model provides a fume hood exhaust device, including a fume hood 1. A draft fan housing 2 is installed on the side of the fume hood 1. The draft fan inside the draft fan housing 2 can introduce air from the fume hood 1 into the draft fan housing 2. The air can be filtered by an activated carbon filter plate 53. After the activated carbon filter plate 53 has been used for a period of time, its end can be removed from the draft fan housing 2 by rotating a bolt 56. Then, a new connecting frame 52 with an activated carbon filter plate 53 can be installed with the bolt 56. A filter assembly 5 is installed on the draft fan housing 2. A frame 3 is fixedly provided on one side of the fume hood 1. Both the draft fan housing 2 and the frame 3 are provided with mounting components 4. An exhaust pipe 6 is provided on one side of the draft fan housing 2. Air Intake System: Fume hoods are typically equipped with air inlets connected to the laboratory's ventilation system via ductwork. When the fume hood is activated, fresh outside air (or treated air) is introduced into the fume hood through the inlet. This ensures a continuous airflow supply within the fume hood, helping to dilute and remove harmful gases. Airflow Control: Fume hoods usually have airflow regulating devices, such as dampers or regulating valves, to control the airflow entering the fume hood. Researchers can adjust the airflow according to the specific needs of the experiment to achieve optimal ventilation. II. Experimental Operations and Gas Generation Experimental Operations: Researchers conduct chemical experiments inside the fume hood, such as solution preparation, reaction observation, and sample processing. During the experiment, various harmful gases, vapors, or particles may be generated. Gas Generation: These harmful substances are released into the fume hood during the experiment and mix with the introduced fresh air. III. Airflow Circulation and Exhaust Airflow Circulation: The airflow inside the fume hood circulates under the drive of a fan. Fresh air enters through the inlet, passes through the experimental area, and carries harmful substances towards the fume hood's exhaust vent. Gas exhaust: The exhaust vent is usually located at the top or rear of the fume hood and is connected to the laboratory's exhaust system. Airflow carrying hazardous substances is exhausted from the laboratory through the exhaust vent and enters a subsequent waste gas treatment system (such as activated carbon adsorption, scrubbing towers, etc.) for further treatment to meet emission standards. The installation assembly 4 includes a fixing frame 41, which is fixedly fitted onto the outer surface of the exhaust fan housing 2. The upper surface of the fixing frame 41 has an insertion hole 42. A cylinder 43 is fixedly installed inside the frame 3. A lifting plate 47 is fixedly installed at the upper end of the limiting plate 46 to facilitate pulling the limiting plate 46. A spring 44 is fixedly installed on the inner surface of the cylinder 43, and a circular plate 45 is fixedly installed at the lower end of the spring 44. Several springs 44 are arranged in a circular array between the inner surface of the cylinder 43 and the circular plate 45 to improve stability after connection. A first sealing strip 49 is fixedly installed on one side of the fixing frame 41, and a first sealing strip 49 is also fixedly installed on one side of the fume hood 1. The sealing groove 48, the first sealing strip 49 and the inner surface of the first sealing groove 48 are movably fitted to improve the sealing performance after connection. The circular plate 45 is fixedly provided with a limiting plate 46. The limiting plate 46 movably passes through the cylinder 43 and the frame 3. The lower end of the limiting plate 46 is movably inserted into the insertion hole 42. The limiting plate 46 can be pulled upward by the lifting plate 47 so that the end of the limiting plate 46 enters the cylinder 43. Then the fixing frame 41 sleeved on the outer surface of the exhaust fan housing 2 can enter the frame 3. After the lifting plate 47 is released, the limiting plate 46 can be inserted into the insertion hole 42 by the force of the spring 44, so as to facilitate the disassembly of the exhaust fan housing 2 and the maintenance of its internal equipment. The filter assembly 5 includes a through groove 51, which is formed on the upper surface of the exhaust fan housing 2. A connecting frame 52 is movably inserted into the through groove 51. An activated carbon filter plate 53 is fixedly installed in the connecting frame 52. A fixing plate 55 is fixedly installed on the upper surface of the connecting frame 52. The fixing plate 55 is movably fitted to the upper surface of the exhaust fan housing 2. A second sealing strip 54 is fixedly installed on the lower surface of the fixing plate 55. A second sealing groove 57 is fixedly installed on the upper surface of the exhaust fan housing 2. The second sealing strip 54 is movably fitted to the inner surface of the second sealing groove 57 to improve the sealing performance after connection. A bolt 56 is threadedly inserted into the upper surface of the fixing plate 55. The end of the bolt 56 is threadedly inserted into the interior of the exhaust fan housing 2.

[0019] Working principle: When using this utility model, the lifting plate 47 can be used to pull the limiting plate 46 upward, so that the end of the limiting plate 46 enters the cylinder 43. Then, the fixing frame 41 fitted on the outer surface of the exhaust fan housing 2 can enter the frame 3. After releasing the lifting plate 47, the limiting plate 46 can be inserted into the insertion hole 42 by the force of the spring 44, thereby facilitating the disassembly of the exhaust fan housing 2 and maintenance of its internal equipment. The air in the fume hood 1 can be introduced into the fume hood 2 through the air induced draft device inside the air induced draft device housing 2. The air can be filtered by the activated carbon filter plate 53. After the activated carbon filter plate 53 has been used for a period of time, its end can be removed from the air induced draft device housing 2 by rotating the bolt 56. Then, a new connecting frame 52 with the activated carbon filter plate 53 can be installed with the bolt 56.

[0020] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fume hood exhaust device, comprising a fume hood (1), characterized in that, The side of the fume hood (1) is equipped with a draft fan housing (2), and a filter assembly (5) is installed on the draft fan housing (2). A frame (3) is fixedly provided on one side of the fume hood (1). Both the draft fan housing (2) and the frame (3) are equipped with mounting components (4). An exhaust pipe (6) is provided on one side of the draft fan housing (2). The installation component (4) includes a fixing frame (41), which is fixedly sleeved on the outer surface of the exhaust fan housing (2). The upper surface of the fixing frame (41) is provided with an insertion hole (42). A cylinder (43) is fixedly installed inside the frame (3). A spring (44) is fixedly installed on the inner surface of the cylinder (43). A circular plate (45) is fixedly installed at the lower end of the spring (44). A limiting plate (46) is fixedly installed inside the circular plate (45). The limiting plate (46) movably passes through the cylinder (43) and the frame (3). The lower end of the limiting plate (46) is movably inserted into the insertion hole (42).

2. The fume hood exhaust device as described in claim 1, characterized in that, The filter assembly (5) includes a through groove (51), which is opened on the upper surface of the exhaust fan housing (2). A connecting frame (52) is movably inserted in the through groove (51), and an activated carbon filter plate (53) is fixedly installed in the connecting frame (52). A fixing plate (55) is fixedly installed on the upper surface of the connecting frame (52), and the fixing plate (55) is movably attached to the upper surface of the exhaust fan housing (2).

3. The fume hood exhaust device as described in claim 1, characterized in that, A first sealing strip (49) is fixedly provided on one side of the fixed frame (41), and a first sealing groove (48) is provided on one side of the fume hood (1). The first sealing strip (49) is in contact with the inner surface of the first sealing groove (48).

4. The fume hood exhaust device as described in claim 1, characterized in that, The upper end of the limiting plate (46) is fixedly provided with a lifting plate (47).

5. The fume hood exhaust device as described in claim 2, characterized in that, The lower surface of the fixed plate (55) is fixedly provided with a second sealing strip (54), and the upper surface of the exhaust fan housing (2) is fixedly provided with a second sealing groove (57). The second sealing strip (54) and the inner surface of the second sealing groove (57) are in contact.

6. The fume hood exhaust device as described in claim 1, characterized in that, The springs (44) are provided in a plurality of units, and the springs (44) are arranged in a ring array between the inner surface of the cylinder (43) and the circular plate (45).

7. The fume hood exhaust device as described in claim 2, characterized in that, The upper surface of the fixing plate (55) is threaded with a bolt (56), and the end of the bolt (56) is threaded inside the housing (2) of the induced draft device.

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