Ventilation mechanism for chemical laboratory

Abstract

The utility model discloses a chemical laboratory ventilation mechanism which comprises a mounting frame and a ventilation mechanism mounted at the upper end of the mounting frame, a mounting groove is formed in the inner wall of a protective cover, a filter screen plate is mounted on the inner wall of the mounting groove in a penetrating manner, ventilation fans are mounted on the inner walls of two mounting seats, and air guide pipes are connected to the tops of the two mounting seats in a penetrating manner. Folding pipes are connected to the inner walls of the connecting grooves in a penetrating manner; ventilation hoods are mounted at one ends of the two folding pipes; according to the utility model, the protective cover is rotated and opened, the filter screen plate in the protective cover can be disassembled, assembled and replaced, and meanwhile, during ventilation, the ventilation cover is pulled out of the connecting groove and supported through the folding pipe, so that different ventilation angles can be adjusted, targeted suction and ventilation can be conveniently carried out on gas generated by laboratory experiments, and the problem that in actual use, the ventilation angle is not changed is solved. A filtering structure in the ventilation mechanism is not easy to disassemble, assemble and replace, the ventilation angle cannot be adjusted, and the ventilation effect in the laboratory is affected.

Description

Technical Field

[0001] This utility model relates to the technical field of ventilation in chemical laboratories, specifically a ventilation mechanism for chemical laboratories. Background Technology

[0002] Chemical laboratories primarily conduct research, analysis, and teaching in fields such as inorganic chemistry, organic chemistry, and polymer chemistry. They typically include physical and chemical laboratories, precision instrument rooms, balance rooms, standard solution rooms, reagent rooms, storage rooms, high-temperature rooms, and pure water rooms. The main tasks include routine experimental operations and instrumental analysis such as sample processing, volumetric analysis, centrifugation, precipitation, and filtration. However, because chemical laboratories frequently conduct research on special materials, generating harmful gases during the process, ventilation systems are necessary to constantly exchange the air and improve the safety of researchers. To address this, Chinese patent number CN221098889U proposes a cleanroom ventilation system. This system solves the problems of existing laboratory ventilation systems, which are generally installed on the ceiling, far from the experimental table, preventing the timely removal of irritating gases generated during experiments and posing a threat to the health of researchers. Furthermore, existing laboratory ventilation systems are generally fixed installations and cannot be adjusted according to different experimental locations, resulting in poor ventilation efficiency.

[0003] However, existing ventilation systems in chemical laboratories require strict sealing to ensure air exchange quality, making the connection areas of such systems complex. This makes it very inconvenient to disassemble and replace the filter elements. Furthermore, the fixed installation position of ordinary ventilation systems prevents the adjustment of the ventilation angle, resulting in poor ventilation in chemical laboratories. Therefore, this design proposes a new ventilation system for chemical laboratories. Utility Model Content

[0004] The purpose of this utility model is to provide a ventilation mechanism for a chemical laboratory to solve the problems mentioned in the background art. To achieve the above objective, this utility model proposes a ventilation mechanism for a chemical laboratory, including a mounting frame and a ventilation and air exchange mechanism mounted on the upper end of the mounting frame;

[0005] The ventilation mechanism includes a protective cover hinged to the bottom of the mounting frame. The inner wall of the protective cover has a mounting groove, and a filter screen is installed through the inner wall of the mounting groove. Mounting seats are fixed on both sides of the top of the mounting frame. A ventilation fan is installed on the inner wall of each of the two mounting seats, and the inner walls of the two mounting seats pass through the inner wall of the mounting frame and communicate with the inner wall of the mounting groove. Air guide pipes are inserted and connected to the top of each of the two mounting seats. A connecting groove is provided on the outer wall of the protective cover, and a folded tube is inserted and connected to the inner wall of each connecting groove. A ventilation hood is installed at one end of each of the two folded tubes. Multiple through holes are equally spaced at the bottom of the ventilation hood.

[0006] In one example, the inner walls of one end of each of the two folded tubes are connected to the inner wall of the mounting groove, and a sealing strip is fixedly provided at the edge of the top of the protective cover.

[0007] In one example, a handle is fixedly provided at the edge of the bottom side of the protective cover, and the outer wall of the ventilation cover is interlocked with the inner wall of the connecting groove.

[0008] In one example, a limiting groove is provided at the middle position of one side of the outer wall of the mounting bracket, and a fixing strip is slidably connected to the inner wall of the limiting groove.

[0009] In one example, a slot is fixedly provided on one side of the outer wall of the protective cover, and the outer wall of one end of the fixing strip is inserted and connected to the inner wall of the slot. Mounting holes are provided at the four corners of the top of the mounting bracket.

[0010] In one example, a control switch is installed at the bottom of the mounting bracket, and the ventilation fan is electrically connected to an external power source via the control switch.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting a ventilation and air exchange mechanism on the ventilation mechanism, ventilation is carried out through the air exchange fan and air guide pipe. After long-term use, the protective cover can be rotated open to disassemble and replace the filter screen. At the same time, during ventilation, the ventilation cover can be pulled out from the connecting groove and supported by the folding tube, so that different ventilation angles can be adjusted. This facilitates targeted suction and air exchange of gases generated in laboratory experiments, solving the problems that the internal filter structure of the ventilation mechanism is not easy to disassemble and replace and the ventilation and air exchange angle cannot be adjusted, which affects the air exchange effect inside the laboratory. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the protective cover of this utility model when rotated and opened;

[0014] Figure 3 This is a schematic diagram of the structure of the bottom of the protective cover of this utility model;

[0015] Figure 4 Appendix to the specification of this utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0016] In the diagram: 1. Mounting bracket; 2. Ventilation and air exchange mechanism; 201. Protective cover; 202. Mounting groove; 203. Filter screen; 204. Mounting base; 205. Ventilation fan; 206. Air guide pipe; 207. Connecting groove; 208. Folded pipe; 209. Ventilation cover; 210. Through hole; 3. Sealing strip; 4. Handle; 5. Limiting slide groove; 6. Fixing strip; 7. Slot; 8. Mounting hole. 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] Please see Figure 1-4 This utility model provides a technical solution: a ventilation mechanism for a chemical laboratory, including a mounting frame 1 and a ventilation and air exchange mechanism 2 installed on the upper end of the mounting frame 1;

[0019] The ventilation mechanism 2 includes a protective cover 201 hinged to the bottom of the mounting frame 1. The inner wall of the protective cover 201 is provided with a mounting groove 202. A filter screen 203 is installed through the inner wall of the mounting groove 202. Mounting seats 204 are fixed on both sides of the top of the mounting frame 1. A ventilation fan 205 is installed on the inner wall of each of the two mounting seats 204. The inner walls of the two mounting seats 204 pass through the inner wall of the mounting frame 1 and communicate with the inner wall of the mounting groove 202. A duct pipe 206 is inserted and connected to the top of each of the two mounting seats 204. A connecting groove 207 is provided on the outer wall of the protective cover 201. A folded pipe 208 is inserted and connected to the inner wall of the connecting groove 207. A ventilation cover 209 is installed at one end of each of the two folded pipes 208. Multiple through holes 210 are opened at equal intervals at the bottom of the ventilation cover 209.

[0020] In use, the entire ventilation system is installed in the chemical laboratory using the mounting bracket 1, and then connected to the outside via the air duct 206. During ventilation, the ventilation fan 205 inside the mounting base 204 is activated to allow rapid air exchange through the air duct 206 and the ventilation hood 209. During air exchange, the exchanged gas is filtered by the filter screen 203 in the mounting slot 202 inside the protective cover 201. After prolonged filtration, the protective cover 201 is rotated open at the bottom of the mounting bracket 1 to expose the mounting slot 202 containing the filter screen 203, making it convenient for staff to replace it. If a large amount of gas is generated in the laboratory during ventilation, the ventilation hood 209 can be pulled out from the connecting slot 207, supported by the folding tube 208, and connected to the mounting slot 202. By adjusting the angle of the ventilation hood 209, it can quickly extract and exchange gas in the gas-generating area, improving the ventilation effect in the laboratory. This solves the problems of the ventilation system's internal filter structure being difficult to disassemble and replace, and the inability to adjust the ventilation angle, which affects the ventilation effect in the laboratory.

[0021] Furthermore, the inner walls of one end of each of the two folded tubes 208 are connected to the inner wall of the mounting groove 202. A sealing strip 3 is fixedly provided at the top edge of the protective cover 201. The folded tubes 208 are made of plastic material and can be fitted with folded wires. The ventilation cover 209 is lightweight. After being pulled out of the connecting groove 207, the ventilation cover 209 can be supported at any angle by the folded tubes 208. After the upper protective cover 201 is closed, the sealing strip 3 contacts the mounting bracket 1 to achieve a seal and prevent gas leakage.

[0022] Furthermore, a handle 4 is fixedly provided on one edge of the bottom of the protective cover 201. The outer wall of the ventilation cover 209 is inserted and connected to the inner wall of the connecting groove 207. When opening and closing the protective cover 201, it is more convenient to operate it through the handle 4.

[0023] Furthermore, a limiting groove 5 is provided in the middle of one side of the outer wall of the mounting bracket 1, and a fixing strip 6 is slidably connected to the inner wall of the limiting groove 5.

[0024] A slot 7 is fixedly provided on one side of the outer wall of the protective cover 201, and the outer wall of one end of the fixing strip 6 is inserted and connected to the inner wall of the slot 7. Mounting holes 8 are provided at the four corners of the top of the mounting frame 1. When the protective cover 201 is opened and closed, the fixing strip 6 is slid in the limiting slide groove 5 so that it is inserted in the inner wall of the slot 7, thereby realizing the connection and fixation between the mounting frame 1 and the protective cover 201.

Claims

1. A ventilation mechanism for a chemical laboratory, comprising a mounting frame (1) and a ventilation and air exchange mechanism (2) mounted on the upper end of the mounting frame (1); characterized in that: The ventilation mechanism (2) includes a protective cover (201) hinged to the bottom of the mounting frame (1). The inner wall of the protective cover (201) has a mounting groove (202). A filter screen (203) is installed through the inner wall of the mounting groove (202). Mounting seats (204) are fixed on both sides of the top of the mounting frame (1). A ventilation fan (205) is installed on the inner wall of each of the two mounting seats (204). The inner walls of the two mounting seats (204) pass through the ventilation fan (205). The inner wall of the mounting bracket (1) is connected to the inner wall of the mounting groove (202). The tops of the two mounting bases (204) are connected to the air guide pipes (206). The outer wall of the protective cover (201) is provided with a connecting groove (207). The inner wall of the connecting groove (207) is connected to the folded pipes (208). One end of the two folded pipes (208) is equipped with a ventilation cover (209). The bottom of the ventilation cover (209) is provided with multiple through holes (210) at equal intervals.

2. The ventilation mechanism for a chemical laboratory according to claim 1, characterized in that: The inner walls of one end of the two folded tubes (208) are respectively connected to the inner wall of the mounting groove (202), and a sealing strip (3) is fixedly provided at the top edge of the protective cover (201).

3. A ventilation mechanism for a chemical laboratory according to claim 1, characterized in that: A handle (4) is fixedly provided on one side of the bottom edge of the protective cover (201), and the outer wall of the ventilation cover (209) is interlocked with the inner wall of the connecting groove (207).

4. A ventilation mechanism for a chemical laboratory according to claim 1, characterized in that: A limiting groove (5) is provided at the middle position of one side of the outer wall of the mounting bracket (1), and a fixing strip (6) is slidably connected to the inner wall of the limiting groove (5).

5. A ventilation mechanism for a chemical laboratory according to claim 1, characterized in that: A slot (7) is fixedly provided on one side of the outer wall of the protective cover (201), and the outer wall of one end of the fixing strip (6) is inserted and connected to the inner wall of the slot (7). Mounting holes (8) are provided at the four corners of the top of the mounting bracket (1).

6. A ventilation mechanism for a chemical laboratory according to claim 1, characterized in that: A control switch is installed at the bottom of the mounting bracket (1), and the ventilation fan (205) is electrically connected to an external power supply through the control switch.

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