A fumehood for laboratory work

Abstract

This utility model provides a tabletop lift-type laboratory fume hood, relating to the field of laboratory fume hoods. It includes: a cabinet body; an exhaust duct on the upper side of the cabinet body, with an exhaust fan connected to the outer end of the exhaust duct; a filter assembly connected to the outer end of the exhaust fan; a filter box containing filter elements and a partition inside the filter box; a dust collection hood on the inner side of the cabinet body, with a flexible hose connected to its rear side; the lower end of the flexible hose connecting to a rear exhaust port on the rear side of the operating table; an electric actuator connected to the lower end of the operating table; a tabletop on the lower side of the operating table; and a storage box on the lower side of the tabletop. This utility model facilitates height adjustment of the operating table inside the cabinet and enables effective filtration and suction close to the operating table.

Description

Technical Field

[0001] This utility model relates to the field of laboratory fume hood technology, specifically to a tabletop lift-type laboratory fume hood. Background Technology

[0002] Traditional laboratory fume hoods have a fixed work surface height. When items are placed on the work surface, they are difficult for shorter people to reach. A search revealed existing technology (publication number: CN209530928U), which describes "a lifting test bench and its application in a fume hood, comprising a lifting frame and a platform mounted on the lifting frame, the platform being able to move up and down under the drive of the lifting frame; the lifting frame includes left and right bases, left and right telescopic rods respectively mounted on the left and right bases, and a top frame connected to the top of the left and right telescopic rods; the top frame includes a crossbeam spanning between the left and right telescopic rods, and left and right drive receiving cavities are provided on the top frame, each containing a left and right drive device capable of driving the left and right telescopic rods to extend and retract respectively; it also includes a storage box and an electrical control device located below the platform, the storage box being recessed into the outer boundary of the platform when viewed from a top view; the electrical control device is stored in the storage box, and the electrical control box can move up and down with the platform, the electrical control device being signal-connected to the left and right drive devices and capable of driving the left and right telescopic rods to move up and down synchronously through the left and right drive devices."

[0003] While existing lifting test benches and their associated fume hoods have achieved adjustable tabletop height, they still have some shortcomings: Firstly, existing laboratory fume hoods typically use a top-suction method, resulting in a significant distance from the work surface. This means that experiments that produce harmful gases cannot be quickly extracted, potentially posing a safety hazard of inhalation. Secondly, the air exhausted from the laboratory by the exhaust fan is usually only filtered through a single filter before being released into the environment. Therefore, some harmful gases may not be completely adsorbed and filtered before being released into the environment, causing pollution. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, a tabletop lift-type laboratory fume hood is provided to solve the problems mentioned in the background.

[0005] To achieve the above objectives, a tabletop lift-type laboratory fume hood is provided, comprising: a cabinet body, an exhaust pipe on the upper side of the cabinet body, an exhaust fan connected to the outer end of the exhaust pipe, and a filter assembly connected to the outer end of the exhaust fan, the filter assembly including a filter box, a filter element inside the filter box, and a partition inside the filter box, a dust collection hood on the inner side of the cabinet body, the dust collection hood including a flexible hose connected to the rear side, the lower end of the flexible hose being connected to a rear exhaust port opened on the rear side of the operating table, an electric actuator connected to the lower end of the operating table, a tabletop on the lower side of the operating table, and a storage box on the lower side of the tabletop.

[0006] Furthermore, an air inlet pipe and an air outlet pipe are respectively connected to both sides of the filter box, and a cover plate is provided on the upper side of the filter box, with a sealing block connected to the lower end of the cover plate.

[0007] Furthermore, a connecting rod connects the filter element and the sealing block, and a partition is provided between the filter elements, with the longitudinal length of the partition being less than the internal height of the filter box.

[0008] Furthermore, one end of the partition is connected to a filter screen, and the partitions are arranged alternately in the horizontal direction.

[0009] Furthermore, a stop bar is connected between the two side walls of the cabinet, and the stop bar is located on the front side of the flexible hose, and guide grooves are provided on the inner walls of both sides of the cabinet.

[0010] Furthermore, the dust hood includes a flared tube, with the upper end of the flared tube connected to the exhaust pipe, and the lower end of the flared tube connected to a cavity plate.

[0011] Furthermore, the cavity plate has an inner cavity, with a connection hole at the upper end of the inner cavity, a side exhaust port at the rear of the inner cavity, and a bottom exhaust port at the lower side of the inner cavity.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. During use, the electric actuator connects to the operating table, and the guide groove allows the operating table to slide against the inner wall of the cabinet, thereby achieving height adjustment of the operating table. This makes it suitable for experimental personnel of different heights. The exhaust fan, exhaust pipe, dust hood, and hose allow for easy connection to the operating table when the exhaust fan is working. This facilitates close contact with the operating space inside the operating table, enabling timely extraction of harmful gases and avoiding the safety hazard of inhalation by experimental personnel.

[0014] 2. The filter assembly, including the filter box, baffle, filter screen, and filter elements, allows the harmful gases discharged by the exhaust fan to flow through the air inlet and outlet pipes in an S-shaped pipe structure within the filter box. The gases pass through multiple sets of filter elements in sequence, thus ensuring complete adsorption of the gases. Furthermore, the connecting rod, sealing block, and cover plate facilitate the removal of multiple filter elements for easy cleaning or replacement. Attached Figure Description

[0015] Figure 1 This is a front view structural diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a side view of an embodiment of the present utility model.

[0017] Figure 3 This is a schematic cross-sectional view of the dust cover according to an embodiment of the present invention.

[0018] Figure 4 This is a cross-sectional structural diagram of the filter assembly according to an embodiment of the present invention.

[0019] In the diagram: 1. Cabinet; 11. Exhaust duct; 12. Exhaust fan; 13. Filter assembly; 131. Filter box; 132. Cover plate; 133. Sealing block; 134. Connecting rod; 135. Filter element; 136. Partition; 137. Filter screen; 138. Inlet duct; 139. Outlet duct; 14. Dust hood; 141. Cavity plate; 142. Inner cavity; 143. Lower exhaust port; 144. Side exhaust port; 145. Connecting hole; 146. Flared pipe; 15. Flexible hose; 16. Baffle bar; 17. Operating table; 171. Rear exhaust port; 18. Storage box; 19. Electric actuator; 110. Guide groove; 111. Tabletop. Detailed Implementation

[0020] 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.

[0021] Reference Figures 1 to 4As shown, this utility model provides a tabletop lift-type laboratory fume hood, including: a cabinet body 1, an exhaust pipe 11 on the upper side of the cabinet body 1, an exhaust fan 12 connected to the outer end of the exhaust pipe 11, a filter assembly 13 connected to the outer end of the exhaust fan 12, the filter assembly 13 including a filter box 131, a filter element 135 inside the filter box 131, and a partition 136 inside the filter box 131, a dust collection hood 14 on the inner side of the cabinet body 1, a flexible hose 15 connected to the rear side of the dust collection hood 14, the lower end of the flexible hose 15 connected to a rear exhaust port 171 opened on the rear side of the operating table 17, an electric push rod 19 connected to the lower end of the operating table 17, a tabletop 111 on the lower side of the operating table 17, a storage box 18 on the lower side of the tabletop 111, a baffle 16 connected between the two side walls of the cabinet body 1, the baffle 16 being located in front of the flexible hose 15, and guide grooves 110 opened on the inner side walls of both sides of the cabinet body 1.

[0022] In this embodiment, the front side of the cabinet 1 and the upper side of the table 111 are provided as an open operating space.

[0023] Specifically, the storage box 18 has a door on the front and multiple shelves on the inside for easy placement of experimental equipment.

[0024] Specifically, the flexible hose 15 is designed as an elastic tube structure, including an outer corrugated tube and a spiral spring installed on the inner wall of the tube. The flexible hose 15 is provided with multiple sets, so that the flexible hose 15 can be extended and retracted during the lifting and lowering of the operating table 17.

[0025] As a preferred embodiment, by providing a stop bar 16, it is possible to achieve a blocking effect on the hose 15 during the extension and retraction of the hose 15.

[0026] Specifically, the two side walls of the operating table 17 are provided with sliders, and the sliders are slidably connected in the guide groove 110, thereby enhancing the stable movement of the operating table 17.

[0027] like Figure 4 In the filter box 131, an air inlet pipe 138 and an air outlet pipe 139 are connected to both sides respectively. The filter box 131 is provided with a cover plate 132 on the upper side, and a sealing block 133 is connected to the lower end of the cover plate 132. A connecting rod 134 is connected between the filter element 135 and the sealing block 133. A partition plate 136 is provided between the filter elements 135. The longitudinal length of the partition plate 136 is less than the internal height of the filter box 131. A filter screen 137 is connected to one end of the partition plate 136. The partition plates 136 are arranged alternately in the horizontal direction.

[0028] Specifically, the lower end of the cover plate 132 is connected to four sealing blocks 133, and the sealing blocks 133 are snapped into the slots opened on the upper side of the filter box 131 to achieve a sealing effect on the slots after the filter element 135 is installed.

[0029] Specifically, the baffle 136 and the filter screen 137 are designed as an integrated structure, and when a set of baffles 136 and filters 137 are alternately arranged, they are arranged in reverse order so that the gas being drawn in passes through multiple filter elements 135 in sequence.

[0030] Specifically, the filter element 135 can be set as activated carbon filter material, nanoporous composite filter material, synthetic fiber filter material, and non-woven filter material, etc.

[0031] like Figure 1 and Figure 3 In the process, the dust hood 14 includes a flared tube 146, the upper end of which is connected to the exhaust pipe 11, and the lower end of the flared tube 146 is connected to a cavity plate 141. The cavity plate 141 has an inner cavity 142 inside, and a connection hole 145 is opened at the upper end of the inner cavity 142. A side exhaust port 144 is opened on the rear side of the inner cavity 142, and a lower exhaust port 143 is opened on the lower side of the inner cavity 142.

[0032] Specifically, the side exhaust port 144 and the bottom exhaust port 143 are provided in multiple sets, and the gas drawn in by the two exhaust ports is collected through the inner cavity 142 and then discharged outward through the flared pipe 146.

[0033] In use, the electric actuator connects to the operating table, and the guide groove allows the operating table to slide against the inner wall of the cabinet, thus enabling height adjustment to accommodate experimenters of different heights. The exhaust fan, exhaust pipe, dust hood, and hose allow for easy connection to the operating table while the exhaust fan is running, facilitating close contact with the inner working space and enabling timely extraction of harmful gases, preventing the safety hazard of inhalation by experimenters. The filtration system, including a filter box, partitions, filter screens, and filter elements, directs harmful gases exhausted by the exhaust fan through the inlet and outlet pipes into an S-shaped pipe within the filter box, passing through multiple sets of filter elements to ensure complete gas adsorption. Connecting rods, sealing blocks, and covers facilitate the removal of multiple filter elements for easy cleaning or replacement.

[0034] The tabletop lift-type laboratory fume hood of this invention can effectively solve the problems mentioned in the background technology. Based on the existing tabletop lift-type laboratory fume hood technology, it has the advantages of easy height adjustment of the operating table inside the cabinet, as well as easy to achieve effective filtration and suction close to the operating table.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fume hood for a benchtop fume hood laboratory, comprising: The cabinet (1) is characterized in that: an exhaust pipe (11) is provided on the upper side of the cabinet (1), and an exhaust fan (12) is connected to the outer end of the exhaust pipe (11), and a filter assembly (13) is connected to the outer end of the exhaust fan (12). The filter assembly (13) includes a filter box (131), and a filter element (135) is provided inside the filter box (131). A partition (136) is provided inside the filter box (131). A dust collection hood (14) is provided on the inner side of the cabinet (1), and the dust collection hood (14) includes a flexible hose (15) connected to the rear side, and the lower end of the flexible hose (15) is connected to the rear side of the operating table (17). The rear exhaust vent (171) is connected, and the lower end of the operating table (17) is connected to an electric push rod (19). The lower side of the operating table (17) is provided with a table plate (111), and the lower side of the table plate (111) is provided with a storage box (18). A connecting rod (134) is connected between the filter element (135) and the sealing block (133), and a partition (136) is provided between the filter elements (135), and the longitudinal length of the partition (136) is less than the internal height of the filter box (131). One end of the partition (136) is connected to a filter screen (137), and the partitions (136) are alternately arranged in the horizontal direction.

2. A fumehood according to claim 1, wherein, The filter box (131) is connected to an air inlet pipe (138) and an air outlet pipe (139) on both sides respectively, and the filter box (131) is provided with a cover plate (132) on the upper side, and a sealing block (133) is connected to the lower end of the cover plate (132).

3. A fumehood according to claim 1, wherein, A stop bar (16) is connected between the two side walls of the cabinet (1), and the stop bar (16) is located in front of the hose (15), and guide grooves (110) are provided on the inner walls of both sides of the cabinet (1).

4. A fumehood according to claim 1 wherein, The dust hood (14) includes a flared tube (146), the upper end of which is connected to the exhaust pipe (11), and the lower end of which is connected to a cavity plate (141).

5. A fumehood according to claim 4, wherein, The cavity plate (141) has an inner cavity (142) inside, and a connection hole (145) is opened at the upper end of the inner cavity (142). A side exhaust port (144) is opened on the rear side of the inner cavity (142), and a bottom exhaust port (143) is opened on the lower side of the inner cavity (142).

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