Ventilation cabinet capable of adjusting air volume
By designing adjustment and filtration mechanisms within the fume hood, the problem of fixed exhaust port size is solved, enabling flexible airflow adjustment and improving the fume hood's adaptability and air quality protection effectiveness.
Patent Information
- Application Number
- CN202422983959.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The existing fume hoods have fixed exhaust vent sizes that cannot be adjusted as needed, resulting in a lack of flexibility in adjusting the airflow.
An adjustable air volume fume hood was designed. The baffle moves on the exhaust hole through the adjustment mechanism to adjust the size of the exhaust hole. Combined with the filter mechanism, it prevents debris from entering and uses a fan to exhaust the air.
It enables flexible adjustment of air volume, improves the adaptability and efficiency of fume hoods, and protects laboratory air quality.
Smart Images
Figure CN223847725U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fume hood technology, and more specifically, to a fume hood with adjustable airflow. Background Technology
[0002] Fume hoods generate negative pressure through fan operation, lowering the air pressure inside the hood compared to the external environment. This allows fresh outside air to enter through the fume hood's operating ports and other openings. Harmful gases, vapors, dust, and other pollutants generated inside the fume hood are drawn into the ventilation ducts under this negative pressure, then transported by the fan and discharged into the outdoor atmosphere. This ensures air quality in the laboratory, protects the health and safety of operators, and prevents damage to laboratory equipment. Existing fume hoods have fixed exhaust vent sizes, preventing users from adjusting them as needed. Therefore, we propose a fume hood with adjustable airflow. Utility Model Content
[0003] In order to overcome the shortcomings of the prior art, this utility model provides an adjustable air volume fume hood to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: an adjustable air volume fume hood, comprising a fume hood body, a ventilation chamber disposed at the upper part of the fume hood body, an annular shell connected below the ventilation chamber, a funnel shell connected above the ventilation chamber, an exhaust pipe connected above the funnel shell, a filter mechanism installed below the annular shell, a horizontal plate fixed inside the annular shell, a sliding rod disposed directly above the horizontal plate, one end of the sliding rod passing through the side wall of the annular shell and connected to an adjustment mechanism, a plurality of exhaust holes spaced apart on the horizontal plate, and a baffle placed on one side of the horizontal plate above the plurality of exhaust holes, and the baffle is fixed to the sliding rod by a support rod.
[0005] As a preferred technical solution of this utility model, the filtration mechanism includes a cover plate, which is placed below the annular shell. The cover plate has an opening, and a filter screen is fixed inside the opening. L-shaped plates are fixed on both sides of the annular shell, and a limiting mechanism is provided between the L-shaped plates and the cover plate.
[0006] In a preferred embodiment of this utility model, the limiting mechanism includes a limiting hole, a sleeve, and an insertion hole. The limiting hole is located on the side wall of the cover plate, and the insertion hole is located on one side of the L-shaped plate. A sleeve is fixed to the L-shaped plate on the side of the insertion hole. A limiting rod is installed inside the sleeve. One end of the limiting rod passes through the insertion hole and is inserted into the limiting hole. The other end of the limiting rod passes through the sleeve and extends outward. A spring is sleeved on the limiting rod. One end of the spring is fixed to the limiting rod, and the other end of the spring is fixed to the inner wall of the sleeve.
[0007] As a preferred technical scheme of the utility model, two said limit rods are fixed with a pull rod.
[0008] As a preferred technical scheme of the utility model, the adjusting mechanism comprises an annular plate and a sliding plate, the annular plate is fixed to the side wall of the annular shell, the sliding plate is fixed to one end of the sliding rod, and the sliding plate is slidingly arranged in the annular plate, both side walls of the annular plate are fixed with bearings, one of the bearings is connected with a threaded rod, one end of the threaded rod passes through the upper sliding plate and the other bearing and is fixed with a rotating handle, and the threaded rod and the upper sliding plate are connected through threads.
[0009] Compared with the prior art, the utility model has the beneficial effects as follows:
[0010] The utility model discloses a fan is connected on the exhaust pipe, can carry out exhaust to the ventilation cabinet main body through starting the fan, can prevent some sundries from entering the annular shell through the filtering mechanism, can drive a plurality of baffle plates to move on the exhaust hole through the adjusting mechanism, can adjust the size of the exhaust hole, thereby can adjust the air volume. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is the three-dimensional structure schematic diagram of the utility model discloses a ventilation cabinet of adjustable air volume;
[0012] Figure 2 It is the main view structure schematic diagram of the utility model discloses a ventilation cabinet of adjustable air volume;
[0013] Figure 3 It is the horizontal plate overhead structure schematic diagram of the utility model discloses a ventilation cabinet of adjustable air volume;
[0014] Figure 4 It is the limiting mechanism structure schematic diagram of the utility model discloses a ventilation cabinet of adjustable air volume;
[0015] Figure 5 It is the adjusting mechanism structure schematic diagram of the utility model discloses a ventilation cabinet of adjustable air volume.
[0016] In the drawing: 1, ventilation cabinet main body;2, annular shell;3, funnel shell;4, exhaust pipe;5, cover plate;6, filter screen;7, limiting mechanism;71, limiting hole;72, sleeve;73, limit rod;74, spring;75, jack;8, adjusting mechanism;81, annular plate;82, bearing;83, threaded rod;84, sliding plate;85, rotating handle;9, L-shaped plate;10, pull rod;11, sliding rod;12, horizontal plate;13, exhaust hole;14, baffle;15, support rod. DETAILED DESCRIPTION
[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] like Figures 1 to 5 As shown, this utility model provides an adjustable air volume fume hood, including a fume hood body 1. A ventilation chamber is arranged at the top of the fume hood body 1. An annular shell 2 is connected to the bottom of the ventilation chamber. A funnel shell 3 is connected to the top of the ventilation chamber. An exhaust pipe 4 is connected to the top of the funnel shell 3. A fan is connected to the exhaust pipe 4. When the fan is turned on, the fume hood body 1 can be vented. A filter mechanism is installed at the bottom of the annular shell 2. The filter mechanism can prevent some debris from entering the annular shell 2. A horizontal plate 12 is fixed inside the annular shell 2. A sliding rod 11 is arranged directly above the horizontal plate 12. One end of the sliding rod 11 passes through the side wall of the annular shell 2 and is connected to an adjustment mechanism 8. Multiple exhaust holes 13 are spaced apart on the horizontal plate 12. A baffle 14 is placed on the horizontal plate 12 above each of the multiple exhaust holes 13. The baffle 14 is fixed to the sliding rod 11 by a support rod 15. The adjustment mechanism 8 can drive the multiple baffles 14 to move on the exhaust holes 13, thereby adjusting the size of the exhaust holes 13.
[0019] The filtration mechanism includes a cover plate 5, which is placed below the annular housing 2. The cover plate 5 has an opening, and a filter screen 6 is fixed inside the opening. L-shaped plates 9 are fixed on both sides of the annular housing 2, and a limiting mechanism 7 is provided between the L-shaped plates 9 and the cover plate 5. The gas entering the annular housing 2 can be filtered through the filter screen 6, and the cover plate 5 can be limited by the limiting mechanism 7.
[0020] The limiting mechanism 7 includes a limiting hole 71, a sleeve 72, and an insertion hole 75. The limiting hole 71 is located on the side wall of the cover plate 5, and the insertion hole 75 is located on one side of the L-shaped plate 9. The sleeve 72 is fixed on the L-shaped plate 9 on the side of the insertion hole 75. A limiting rod 73 is installed inside the sleeve 72. One end of the limiting rod 73 passes through the insertion hole 75 and is inserted into the limiting hole 71. The cover plate 5 can be limited by the limiting rod 73 being inserted into the limiting hole 71. The other end of the limiting rod 73 passes through the sleeve 72 and extends outward. A pull rod 10 is fixed between the two limiting rods 73. A spring 74 is sleeved on the limiting rod 73. One end of the spring 74 is fixed to the limiting rod 73, and the other end of the spring 74 is fixed to the inner wall of the sleeve 72. When it is necessary to disassemble the cover plate 5, it is only necessary to pull the pull rod 10 to pull one end of the two limiting rods 73 out of the limiting hole 71.
[0021] The adjusting mechanism 8 comprises a ring-shaped plate 81 and a sliding plate 84, the ring-shaped plate 81 is fixed on the side wall of the ring-shaped shell 2, the sliding plate 84 is fixed on one end of the sliding rod 11, and the sliding plate 84 is slidingly arranged in the ring-shaped plate 81, the two side walls of the ring-shaped plate 81 are both fixed with bearings 82, one of the bearings 82 is connected with a threaded rod 83, one end of the threaded rod 83 penetrates through the upper sliding plate 84 and the other bearing 82 and is fixed with a rotating handle 85, the threaded rod 83 is connected with the upper sliding plate 84 through threads, rotating the rotating handle 85 can drive the threaded rod 83 to rotate, the threaded rod 83 rotating can drive the sliding plate 84 to slide in the ring-shaped plate 81, and the sliding plate 84 moving can drive the sliding rod 11 to move, so that the plurality of baffles 14 can be moved.
[0022] The working principle and use process of the utility model are as follows: the main body 1 of the fume hood can be exhausted by starting the fan, some sundries can be prevented from entering the ring-shaped shell 2 by the filtering mechanism, the threaded rod 83 can be driven to rotate by rotating the rotating handle 85, the sliding plate 84 can be driven to slide in the ring-shaped plate 81 by the threaded rod 83 rotating, the sliding plate 84 moving can drive the sliding rod 11 to move, so that the plurality of baffles 14 can be moved, the size of the exhaust hole 13 can be adjusted by the plurality of baffles 14 moving, so that the air volume can be adjusted.
[0023] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.
[0024] Although the embodiments of the utility model have been shown and described, it should be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. An adjustable air volume fume hood, comprising a fume hood body (1), a fume chamber is arranged above in the fume hood body (1), characterized in that: The ventilation warehouse is connected with an annular shell (2) below, a funnel shell (3) above, and an exhaust pipe (4) above the funnel shell (3), a filtering mechanism is installed below the annular shell (2), a cross plate (12) is fixed in the annular shell (2), a sliding rod (11) is arranged directly above the cross plate (12), one end of the sliding rod (11) penetrates through the side wall of the annular shell (2) and is connected with an adjusting mechanism (8), a plurality of exhaust holes (13) are arranged on the cross plate (12) at intervals, and a baffle (14) is placed on one side of the cross plate (12) above the plurality of exhaust holes (13), and the baffle (14) and the sliding rod (11) are fixed through a support rod (15).
2. A fume hood according to claim 1, wherein: The filtering mechanism comprises a cover plate (5) placed below the annular shell (2), an opening is formed in the cover plate (5), and a filter screen (6) is fixed in the opening, L-shaped plates (9) are fixed on both sides of the side walls of the annular shell (2), and a limiting mechanism (7) is arranged between the L-shaped plates (9) and the cover plate (5).
3. A fume hood according to claim 2, wherein: The limiting mechanism (7) comprises a limiting hole (71), a sleeve (72) and a plug hole (75), the limiting hole (71) is formed in the side wall of the cover plate (5), the plug hole (75) is formed in one side of the L-shaped plate (9), the sleeve (72) is fixed on the L-shaped plate (9) on one side of the plug hole (75), a limiting rod (73) is arranged in the sleeve (72), one end of the limiting rod (73) penetrates through the plug hole (75) and is inserted into the limiting hole (71), the other end of the limiting rod (73) penetrates through the sleeve (72) and extends outward, a spring (74) is sleeved on the limiting rod (73), one end of the spring (74) is fixed on the limiting rod (73), and the other end of the spring (74) is fixed on the inner wall of the sleeve (72).
4. A fume hood according to claim 3, wherein: Two limiting rods (73) are fixed with a pull rod (10).
5. A fume hood of claim 1, wherein: The adjusting mechanism (8) comprises an annular plate (81) and a sliding plate (84), the annular plate (81) is fixed on the side wall of the annular shell (2), the sliding plate (84) is fixed on one end of the sliding rod (11) and slidably arranged in the annular plate (81), the side walls of the annular plate (81) are fixed with bearings (82), one of the bearings (82) is connected with a threaded rod (83), one end of the threaded rod (83) penetrates through the upper sliding plate (84) and the other bearing (82) and is fixed with a rotating handle (85), and the threaded rod (83) and the upper sliding plate (84) are connected through threads.