Multifunctional combined chemical ventilation cabinet
By introducing structures such as louvers, connecting plates, air vents, partitions, and sealed inner and outer pipes into chemical fume hoods, the problems of air intake direction, flow control, and air pressure balance are solved, achieving effective gas replacement and improved safety when expanding the space.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2026-03-17
AI Technical Summary
Existing multi-functional modular chemical fume hoods are difficult to control effectively when expanding the usable space, resulting in disordered airflow and unbalanced air pressure, posing safety hazards and wasting space resources.
It adopts a structure including louvers, connecting plates, air vanes, partitions, sealed inner and outer pipes, and control components to achieve precise control of air intake direction and flow rate and air pressure balance. The louvers adjust the air intake direction, the air vanes guide the airflow, the partitions divide the channels, the sealed inner and outer pipes form a sealed channel, and the control components integrate control functions.
It achieves effective gas replacement and pressure balance when expanding the space, ensuring safety and efficient use of the equipment, avoiding dead air zones and local gas accumulation, and improving the adaptability of the fume hood.
Smart Images
Figure CN223996902U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical fume hood technology, and in particular to a multifunctional combined chemical fume hood. Background Technology
[0002] In chemical experiments, toxic and harmful gases and fumes are frequently generated. If these substances are not removed in a timely manner, they can seriously endanger the health of laboratory personnel. At the same time, laboratories also pose risks of fire and explosion. As crucial safety equipment, fume hoods must not only effectively remove harmful gases but also minimize the damage in the event of an accident. Therefore, fume hoods need to possess more reliable performance and more functions to meet increasingly stringent laboratory safety standards.
[0003] A typical multi-functional modular chemical fume hood consists of a cabinet, an expansion mechanism, and a gas conversion mechanism. The cabinet provides an operating space isolated from the outside world to ensure the safety of laboratory personnel. The expansion mechanism allows for flexible adjustment of the internal structure of the cabinet or the addition of functional modules according to experimental needs, improving the adaptability of the fume hood. The gas conversion mechanism uses airflow channels and guide structures to guide and exhaust the gases generated during experiments inside the cabinet, preventing gases from flowing to the outside of the cabinet.
[0004] In practical applications, some of the chemical fume hood devices in the aforementioned technologies struggle to effectively replace the gas inside the hood while simultaneously achieving precise control over the airflow direction and volume, and maintaining pressure balance within the hood. This results in some of the newly added space being unusable due to disordered airflow and low ventilation efficiency when expanding the fume hood's usable space. This not only wastes the space resources available for equipment expansion but also poses safety hazards due to localized gas accumulation, thus limiting the application efficiency of chemical fume hoods in complex experimental scenarios and under space expansion requirements. Therefore, a multi-functional modular chemical fume hood is proposed to address these issues. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a multifunctional combined chemical fume hood, which aims to improve the problem that some devices in the prior art are unable to effectively replace the gas inside the cabinet, while controlling the air intake direction and flow rate and maintaining air pressure balance, which makes it impossible to effectively use some spaces when expanding the usable space.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A multi-functional modular chemical fume hood includes a cabinet body, an internal ventilation mechanism, and an external extension mechanism. The ventilation mechanism includes multiple louvers, the outer sides of which are rotatably connected to the inner sides of the cabinet body. A connecting plate is slidably connected to the inside of each louver. Air plates and partitions are fixedly connected to the inner sides of the cabinet body. Sealed inner tubes are fixedly connected to the outer sides of the cabinet body, and sealed outer tubes are threaded onto the outer sides of each sealed inner tube. A flow-guiding assembly is fixedly connected to the top of the cabinet body, a placement assembly is fixedly connected to the bottom of the cabinet body, and a control assembly is installed on the outside of the cabinet body.
[0008] As a further description of the above technical solution:
[0009] The extension mechanism includes multiple sockets, the sockets are fixedly connected to the inner wall of the cabinet, the inner sides of the cabinet are fixedly connected to slide rods, the slide rods are slidably connected to multiple lights, the outer sides of the cabinet are fixedly connected to small cabinets, and the outer sides of the small cabinets are rotatably connected to observation windows.
[0010] As a further description of the above technical solution:
[0011] The bottom of the small cabinet is fixedly connected to a storage cabinet, and the interior of the storage cabinet has multiple slidable drawers for classification.
[0012] As a further description of the above technical solution:
[0013] The air intake assembly includes an air intake pipe, the bottom of which is fixedly connected to the top of the cabinet, and air outlet pipes are fixedly connected to both sides of the top of the cabinet.
[0014] As a further description of the above technical solution:
[0015] The placement assembly includes a base cabinet, the top of which is fixedly connected to the bottom of the cabinet body, and multiple partition doors are rotatably connected to the outside of the base cabinet;
[0016] As a further description of the above technical solution:
[0017] The control assembly includes a control board, which is externally mounted on the outside of the cabinet. Control buttons are fixedly connected to the outside of the control board, and a main control panel is fixedly connected to the top outer side of the cabinet.
[0018] As a further description of the above technical solution:
[0019] The outer sealing tube is fixedly connected to the outside of the base cabinet, and the partition plate is fixedly connected to the inside of the cabinet on the side of the air plate and the inner sealing tube, so that the air outlet pipe leads out the internal gas of the cabinet and the small cabinet.
[0020] As a further description of the above technical solution:
[0021] The small cabinet is externally snapped onto the outside of the sealed inner tube, and the internal wall of the small cabinet is supported on the outside of the sealed outer tube.
[0022] This utility model has the following beneficial effects:
[0023] 1. In this utility model, by controlling the angle of the louvers, the connecting plate synchronously adjusts the angle of other louvers, thereby controlling the air intake direction and flow rate. The air plate guides the airflow to the channels on both sides of the cabinet. In conjunction with the partition plate, the internal channel of the cabinet is divided into two exhaust zones. The airflow in the sealed channel composed of the inner and outer sealed pipes and the airflow inside the cabinet are guided together to the exhaust pipe for discharge. At the same time, the air intake pipe replenishes fresh air to maintain the air pressure balance inside the cabinet. This achieves the effects of effective gas replacement, air intake direction and flow rate control, and air pressure balance maintenance.
[0024] 2. In this utility model, the socket is fixed inside the cabinet and the lighting lamp slides along the slide rod to adjust the lighting position, so that it can provide power support and flexible lighting for the equipment inside the cabinet at the same time. The small cabinet is fixed outside the sealed inner tube and the observation window can be closed to view the status of the items inside. This allows the small cabinet to be installed stably without affecting the observation of the status of the items. This solves the problems of fixed power supply position of instruments inside the cabinet and limited lighting angle, and the inconvenience of storing and observing different experimental items separately. Attached Figure Description
[0025] Figure 1 This is a three-dimensional schematic diagram of the multifunctional combined chemical fume hood proposed in this utility model;
[0026] Figure 2 This is a schematic diagram of the sealing outer tube of the multifunctional combined chemical fume hood proposed in this utility model;
[0027] Figure 3 This is a schematic diagram of the air vent of the multifunctional combined chemical fume hood proposed in this utility model;
[0028] Figure 4 for Figure 3 Enlarged view of point A in the middle;
[0029] Figure 5 This is a schematic diagram of the structure of the small cabinet of the multifunctional combined chemical fume hood proposed in this utility model.
[0030] Legend:
[0031] 1. Cabinet body; 2. Ventilation mechanism; 21. Louvers; 22. Connecting plate; 23. Air vane; 24. Divider; 25. Sealed inner tube; 26. Sealed outer tube; 27. Air diversion assembly; 271. Air inlet pipe; 272. Air outlet pipe; 28. Storage assembly; 281. Base cabinet; 282. Divider door; 29. Control assembly; 291. Control panel; 292. Control button; 293. Main control panel; 3. Extension mechanism; 31. Socket; 32. Slide rod; 33. Lighting; 34. Small cabinet; 35. Observation window; 36. Storage cabinet; 37. Classified drawer. Detailed Implementation
[0032] 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.
[0033] Reference Figure 1 , Figure 3 and Figure 4 An embodiment of this utility model is provided: a multi-functional combined chemical fume hood, including a cabinet body 1. The cabinet body 1 serves as the main frame of the fume hood, providing an installation base for the internal ventilation mechanism 2 and the external extension mechanism 3, forming a closed space for chemical experimental operations, isolating harmful gases from the external environment. The cabinet body 1 is equipped with a ventilation mechanism 2 inside and an extension mechanism 3 outside the cabinet body 1.
[0034] Ventilation mechanism 2 includes multiple louvers 21, which are used to adjust the airflow direction and flow rate inside the cabinet and control ventilation efficiency. The outer sides of the multiple louvers 21 are rotatably connected to the inner sides of the cabinet body 1. The inner sides of the louvers 21 are slidably connected to a connecting plate 22, which links the multiple louvers 21 to achieve synchronous adjustment. Air vanes 23 are fixedly connected to both sides of the inner side of the cabinet body 1. The air vanes 23 guide the airflow and prevent air from being trapped in local airflow dead zones inside the cabinet body 1. The partition 24 divides the internal airflow channel space of the cabinet 1 and optimizes the airflow path. Both sides of the cabinet 1 are fixedly connected to the sealed inner tube 25, which forms a sealed channel for guiding exhaust. The sealed inner tube 25 is threadedly connected to the outside of the sealed outer tube 26, which forms a detachable sealed channel with the sealed inner tube 25. The top of the cabinet 1 is fixedly connected to the airflow guiding component 27, the bottom of the cabinet 1 is fixedly connected to the placement component 28, and the outside of the cabinet 1 is installed with the control component 29.
[0035] The air intake assembly 27 includes an air inlet pipe 271, which is used to introduce fresh external air to supplement the airflow inside the cabinet. The bottom of the air inlet pipe 271 is fixedly connected to the top of the cabinet body 1. Both sides of the top of the cabinet body 1 are fixedly connected to air outlet pipes 272, which exhaust harmful gases inside the cabinet to the external exhaust system. The placement assembly 28 includes a base cabinet 281, which provides storage space for experimental supplies and supports the cabinet body 1. The top of the base cabinet 281 is fixedly connected to the bottom of the cabinet body 1, and the outside of the base cabinet 281 is rotatably connected to... There are multiple partition doors 282, which divide the internal space of the base cabinet 281 to achieve classified storage. The control component 29 includes a control board 291, which receives and processes control signals. The control board 291 is installed on the outside of the cabinet 1. A control button 292 is fixedly connected to the outside of the control board 291. The control button 292 is used to manually adjust the parameters of the fume hood. A main control console 293 is fixedly connected to the top outside of the cabinet 1. The main control console 293 integrates the main control functions and display interface of the fume hood to achieve centralized operation.
[0036] Reference Figure 1 , Figure 2 and Figure 5 The extension mechanism 3 includes multiple sockets 31, which provide power interfaces for experimental instruments to meet the power needs of the cabinet. The sockets 31 are fixedly connected to the internal wall of the cabinet 1. Slide rods 32 are fixedly connected to both sides of the inside of the cabinet 1. The slide rods 32 provide sliding tracks for the lighting lamps 33 to adjust the lighting position. Multiple lighting lamps 33 are slidably connected to the outside of the slide rods 32. The lighting lamps 33 provide the lighting conditions required for the experiment. Small cabinets 34 are fixedly connected to both sides of the outside of the cabinet 1. The small cabinets 34 expand the experimental space and are used to temporarily store experimental supplies or auxiliary equipment. The small cabinets 34 are rotatably connected to the outside of the small cabinets 34. The observation windows 35 facilitate observation of the items inside the small cabinets 34 while maintaining their airtightness. A storage cabinet 36 is fixedly connected to the bottom of the small cabinets 34. The storage cabinet 36 provides a large capacity storage space. Multiple classification drawers 37 are slidably connected inside the storage cabinet 36. The classification drawers 37 facilitate the classification and storage of different types of experimental supplies.
[0037] The exterior of the small cabinet 34 is snapped onto the exterior of the sealed inner tube 25. The interior wall of the small cabinet 34 is supported on the exterior of the sealed outer tube 26. The exterior of the sealed outer tube 26 is fixedly connected to the exterior of the base cabinet 281. The partition plate 24 is fixedly connected to the interior of the cabinet 1 on the side of the air plate 23 and the sealed inner tube 25, so that the air outlet pipe 272 leads out the internal gas of the cabinet 1 and the small cabinet 34.
[0038] Working principle: After the control board 291 sends a start command to the main control panel 293 via the control button 292, the ventilation mechanism 2 starts to work. External air enters the cabinet 1 through the air inlet pipe 271. Before entering, the angle of the louvers 21 is controlled to drive the connecting plate 22 to adjust the angle of other louvers 21 synchronously, thereby controlling the air inlet direction and flow rate. After the airflow enters, it guides other air in the cabinet 1 through the air plate 23 to the channels on both sides of the cabinet 1. The partition plate 24 divides the internal channel of the cabinet 1 into two exhaust zones, guiding the airflow in the sealed channel formed by the sealed inner pipe 25 and the sealed outer pipe 26 and the airflow in the cabinet 1 together to the exhaust pipe 272 for discharge. At the same time, the air inlet pipe 271 replenishes fresh air to maintain the air pressure balance inside the cabinet.
[0039] The base cabinet 281, which houses component 28, and the partition door 282 provide classified storage space, support the weight of cabinet 1, and the extension mechanism 3 operates synchronously. The socket 31 powers the instruments inside the cabinet, and the lighting lamp 33 slides along the slide bar 32 to adjust the lighting position. The small cabinet 34 is fixed by snapping onto the outside of the sealed inner tube 25. Its observation window 35 allows the viewer to check the status of the items inside when the cabinet is closed. The bottom storage cabinet 36 and the classified drawer 37 enable classified storage of experimental supplies. The sealed outer tube 26 is fixed to the outside of the base cabinet 281 to enhance structural stability and ensure that the exhaust pipe 272 can simultaneously draw out the gas from cabinet 1 and the small cabinet 34, forming a complete ventilation cycle throughout the process.
[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. Multifunctional combined chemical fume hood, comprising a cabinet body (1), characterized in that: The inside of the cabinet (1) is provided with a ventilation mechanism (2), and the outside of the cabinet (1) is provided with an extension mechanism (3); The ventilation mechanism (2) comprises a plurality of louvers (21), the two sides of the outside of the plurality of louvers (21) are rotatably connected to the two sides of the inside of the cabinet (1), the inside of the louver (21) is slidably connected with a connecting shaft plate (22), the two sides of the inside of the cabinet (1) are fixedly connected with a wind plate (23), the two sides of the inside of the cabinet (1) are fixedly connected with a partition plate (24), the two sides of the outside of the cabinet (1) are fixedly connected with a sealing inner tube (25), the outside of the sealing inner tube (25) is threadedly connected with a sealing outer tube (26), the top of the cabinet (1) is fixedly connected with a drainage assembly (27), the bottom of the cabinet (1) is fixedly connected with a placing assembly (28), and the outside of the cabinet (1) is provided with a control assembly (29).
2. The multifunctional combination chemical fume hood according to claim 1, wherein: The extension mechanism (3) comprises a plurality of sockets (31), the outside of the socket (31) is fixedly connected to the inner wall of the cabinet (1), the two sides of the inside of the cabinet (1) are fixedly connected with a sliding rod (32), the outside of the sliding rod (32) is slidably connected with a plurality of illuminating lamps (33), the two sides of the outside of the cabinet (1) are fixedly connected with a small cabinet (34), and the outside of the small cabinet (34) is rotatably connected with an observation window (35).
3. The multifunctional combination chemical fume hood according to claim 2, wherein: The bottom of the small cabinet (34) is fixedly connected with a storage cabinet (36), and the inside of the storage cabinet (36) is slidably connected with a plurality of classified drawers (37).
4. The multifunctional combination chemical fume hood according to claim 2, wherein: The drainage assembly (27) comprises an air inlet pipe (271), and the bottom of the air inlet pipe (271) is fixedly connected to the top of the cabinet (1).
5. The multifunctional combination chemical fume hood of claim 4, wherein: The placing assembly (28) comprises a bottom cabinet (281), and the top of the bottom cabinet (281) is fixedly connected to the bottom of the cabinet (1).
6. The multifunctional combination chemical fume hood according to claim 3, wherein: The control assembly (29) comprises a control panel (291), and the outside of the control panel (291) is mounted on the outside of the cabinet (1), the outside of the control panel (291) is fixedly connected with a control knob (292), and the top outer side of the cabinet (1) is fixedly connected with a main control table (293).
7. The multifunctional combination chemical fume hood of claim 5, wherein: The outside of the sealing outer tube (26) is fixedly connected to the outside of the bottom cabinet (281), and the partition plate (24) is fixedly connected to the inside of the cabinet (1) on the side close to the wind plate (23) and the sealing inner tube (25), so that the air outlet pipe (272) leads out the inside gas of the cabinet (1) and the small cabinet (34).
8. The multifunctional combination chemical fume hood of claim 2, wherein: The outside of the small cabinet (34) is clamped to the outside of the sealing inner tube (25), and the inner wall of the small cabinet (34) is supported on the outside of the sealing outer tube (26).