Downward discharge type ventilation cabinet capable of safely collecting waste liquid

Abstract

The utility model provides a down-discharge type fume hood capable of safely collecting waste liquid, which comprises an upper hood body, a test cabinet positioned at the bottom of the upper hood body and a lower hood body positioned at the bottom of the test cabinet, an exhaust mechanism is arranged in the lower hood body, a waste liquid collecting device is arranged above the exhaust mechanism, a test bed is arranged above the waste liquid collecting device, and the test bed is arranged above the test bed. An air exhaust structure is arranged on the periphery of the test bed, an air exhaust cavity is formed in the air exhaust structure, a liquid leakage groove is formed in the edge of the test bed, the liquid leakage groove is connected with a waste liquid collecting device, an air exhaust plate is arranged on the inner wall of the cavity of the test cabinet, air exhaust openings are formed in the air exhaust structure and the air exhaust plate, the air exhaust plate and the air exhaust cavity are communicated with the air exhaust mechanism, and the air exhaust cavity is communicated with the air exhaust plate. And an air outlet mechanism is arranged in the upper cabinet body. A liquid leakage groove is formed in the edge of the test bed and connected with a waste liquid collecting device, when liquid topples over, the liquid can flow into the waste liquid collecting device through the liquid leakage groove, waste liquid can be conveniently collected and treated, and meanwhile the liquid is prevented from infiltrating into equipment to cause damage to the equipment.

Description

Technical Field

[0001] The utility model belongs to the field of fume hoods, and particularly relates to a down-draft fume hood capable of safely collecting waste liquid. Background Art

[0002] Fume hoods are widely used in scientific research work, and they can prevent the gases volatilized from test samples from diffusing in the environment. The existing operating space of the fume hood is limited. Generally, operators reach their hands into the working platform inside the fume hood through the operating port below the front panel to work, which is inconvenient for activities. Therefore, the problem of liquid pouring is likely to occur, and some highly volatile liquids will cause many troubles after being poured.

[0003] The existing equipment has insufficient treatment for the poured liquid. When the liquid is poured, seepage may occur, damaging the internal components of the fume hood. Moreover, the process of collecting and cleaning the poured liquid is very troublesome. When the liquid penetrates inside, since the infiltrated liquid is difficult to be affected by the exhaust system, the continuously volatilized gas will slowly diffuse into the environment. And the infiltrated liquid often can only be treated by disassembling the machine, the cleaning work is complicated, residues are likely to appear during the cleaning process, and the gas volatilized during the cleaning process will also affect the staff and the laboratory environment. Content of the Utility Model

[0004] To overcome the deficiencies and existing problems of the prior art, collect the liquid after pouring, and reduce the treatment work after liquid pouring, the utility model provides a down-draft fume hood capable of safely collecting waste liquid.

[0005] The utility model is realized through the following technical solutions:

[0006] A down-draft fume hood capable of safely collecting waste liquid, comprising an upper cabinet body, a test cabinet located at the bottom of the upper cabinet body, and a lower cabinet body located at the bottom of the test cabinet. An exhaust mechanism is arranged inside the lower cabinet body, a waste liquid collection device is arranged above the exhaust mechanism, a test bench is arranged above the waste liquid collection device, an exhaust structure is arranged around the test bench, an exhaust cavity is arranged inside the exhaust structure, a liquid leakage groove is arranged at the edge of the test bench, the liquid leakage groove is connected with the waste liquid collection device, an exhaust plate is arranged on the inner wall of the cavity of the test cabinet, exhaust ports are arranged on both the exhaust structure and the exhaust plate, both the exhaust plate and the exhaust cavity are communicated with the exhaust mechanism, and an air outlet mechanism is arranged inside the upper cabinet body.

[0007] The liquid leakage groove is provided with leakage holes, a liquid collection groove corresponding to the leakage holes is arranged below the liquid leakage groove, a liquid guide pipe is arranged at the bottom of the liquid collection groove, and the liquid guide pipe is connected with the waste liquid collection device.

[0008] The waste liquid collection device includes a placement bin, a collection cylinder is arranged inside the placement bin, a liquid inlet nozzle corresponding to the liquid guide pipe is arranged on the side wall of the collection cylinder, and a limiting mechanism is arranged between the placement bin and the collection cylinder.

[0009] The limiting mechanism includes a limiting groove provided on the outer wall of the collection cylinder, and a limiting block corresponding to the limiting groove is provided on the inner wall of the placement bin.

[0010] The exhaust mechanism includes a wind collection cavity, a exhaust fan is provided below the wind collection cavity, an exhaust duct is connected to the outlet of the exhaust fan, the placement bin is located at the top of the wind collection cavity, and both the exhaust cavity and the exhaust plate communicate with the wind collection cavity.

[0011] An air inlet is further provided at the top of the upper cabinet body, and the air outlet mechanism is located below the air inlet.

[0012] The air outlet mechanism includes an air outlet fan, an air outlet plate is provided below the air outlet fan, an air outlet is provided on the air outlet plate, and the air outlet plate is located at the bottom of the upper cabinet body.

[0013] A handle is provided at the top of the collection cylinder.

[0014] A liquid leakage groove is provided at the edge of the test bench of the present utility model, and the liquid leakage groove is connected to a waste liquid collection device. When the liquid is poured, the liquid will flow into the waste liquid collection device through the liquid leakage groove, which is convenient for collecting and treating the waste liquid. At the same time, it prevents the liquid from seeping into the equipment and causing equipment damage. The periphery of the test bench of the present utility model is provided with an exhaust structure, which can reduce the occurrence of exhaust dead zones and improve the exhaust effect. Description of the Drawings

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 2 is a structural schematic diagram of the waste liquid collection device of the present utility model;

[0017] Figure 3 is a structural schematic diagram of the exhaust mechanism of the present utility model;

[0018] Figure 4 is a structural schematic diagram of the interior of the upper cabinet body of the present utility model;

[0019] Figure 5 is a cross-sectional schematic diagram of the exhaust structure of the present utility model.

[0020] In the figure: 100 - upper cabinet body, 110 - air inlet, 120 - air outlet mechanism, 121 - air outlet fan, 122 - air outlet plate, 200 - test cabinet, 210 - exhaust plate, 300 - lower cabinet body, 310 - test bench, 311 - liquid leakage groove, 320 - exhaust structure, 321 - exhaust cavity, 330 - liquid collection tank, 331 - liquid guide pipe, 340 exhaust mechanism, 341 - wind collection cavity, 342 - exhaust fan, 343 - exhaust duct, 350 - waste liquid collection device, 351 - placement bin, 352 - collection cylinder, 353 - liquid inlet nozzle, 354 - limiting groove, 355 - limiting block. Detailed implementation manners

[0021] For the convenience of understanding by those skilled in the art, the following further describes the present utility model in detail with reference to the accompanying drawings and specific embodiments.

[0022] As Figure 1 shown, a downward exhaust fume hood capable of safely collecting waste liquid includes an upper cabinet body 100, a test cabinet 200 located at the bottom of the upper cabinet body 100, and a lower cabinet body 300 located at the bottom of the test cabinet 200. An exhaust mechanism 340 is provided in the lower cabinet body 300. The exhaust mechanism 340 is used to discharge the volatile gases generated in the test cabinet 200 to prevent the gases from diffusing in the environment. A waste liquid collection device 350 is provided above the exhaust mechanism 340. The waste liquid collection device 350 can collect the waste liquid generated during the test. A test bench 310 is provided above the waste liquid collection device 350. The test bench 310 is used for the test work of the operator. A liquid leakage groove 311 is provided at the edge of the test bench 310. Leak holes are provided on the liquid leakage groove 311. A liquid collection tank 330 corresponding to the leak holes is provided below the liquid leakage groove 311. A liquid guide pipe 331 is provided at the bottom of the liquid collection tank 330. The liquid guide pipe 331 is connected to the waste liquid collection device 350. During the test, if there is a spill, the liquid will flow into the liquid leakage groove 311, then flow from the liquid leakage groove 311 into the liquid collection tank 330, and finally enter the waste liquid collection device 350 through the liquid guide pipe 331 to achieve the collection of the waste liquid.

[0023] As Figure 2 shown, the waste liquid collection device 350 includes a placement bin 351. A collection cylinder 352 is provided in the placement bin 351. A liquid inlet nozzle 353 corresponding to the liquid guide pipe 331 is provided on the side wall of the collection cylinder 352. The liquid flowing out of the liquid guide pipe 331 enters the collection cylinder 352 through the liquid inlet nozzle 353. The liquid guide pipe 331 is made of glass material with good corrosion resistance. During the process of taking out the collection cylinder 352, the collection cylinder 352 needs to be lifted out. When the collection cylinder 352 is lifted, in order to prevent interference between the liquid inlet nozzle 353 and the liquid guide pipe 331, the collection cylinder 352 needs to be rotated first and then lifted. In order to better position the collection cylinder 352 during taking and placing, a limiting mechanism is provided between the placement bin 351 and the collection cylinder 352. The limiting mechanism includes a limiting groove 354 provided on the outer wall of the collection cylinder 352, and a limiting block 355 corresponding to the limiting groove 354 is provided on the inner wall of the placement bin 351. The collection cylinder 352 can be limited at a suitable angle and position through the cooperation of the limiting groove 354 and the limiting block 355. A handle is provided at the top of the collection cylinder 352 for facilitating the taking and placing of the collection cylinder 352.

[0024] As Figure 3 、 5As shown, an exhaust structure 320 is provided around the test bench 310. An exhaust chamber 321 is provided inside the exhaust structure 320. An exhaust plate 210 is provided on the inner wall of the cavity of the test cabinet 200. Exhaust ports are provided on both the exhaust structure 320 and the exhaust plate 210. Both the exhaust plate 210 and the exhaust chamber 321 are in communication with an exhaust mechanism 340. Arranging the exhaust structure 320 around the test bench 310 can reduce the occurrence of exhaust dead zones, prevent gas from diffusing to the outside, and improve the exhaust effect. The volatile gas generated inside the test cabinet 200 will enter the exhaust mechanism 340 through the exhaust ports on the exhaust structure 320 and the exhaust plate 210. The exhaust mechanism 340 includes a wind collection chamber 341. A exhaust fan 342 is provided below the wind collection chamber 341. The outlet of the exhaust fan 342 is connected to an exhaust pipe 343. Both the exhaust chamber 321 and the exhaust plate 210 are in communication with the wind collection chamber 341. The gas entering the wind collection chamber 341 will be discharged by the exhaust fan 342 through the exhaust pipe 343. The placement bin 351 is located at the top of the wind collection chamber 341 and is carried by the wind collection chamber 341, which can reduce the arrangement of other support structures.

[0025] As Figure 4 shown, an air outlet mechanism 120 is provided inside the upper cabinet 100. An air inlet 110 is further provided at the top of the upper cabinet 100. The air inlet 110 can be connected to an external air inlet pipe to connect the circulation pipeline and realize air circulation. The air outlet mechanism 120 is located below the air inlet 110. The air outlet mechanism 120 includes an air outlet fan 121. An air outlet plate 122 is provided below the air outlet fan 121. Air outlet ports are provided on the air outlet plate 122. The air outlet plate 122 is located at the bottom of the upper cabinet 100. During the operation of the fume hood, clean air enters from the air inlet 110 and is then blown downward into the test cabinet 200 by the air outlet fan 121 through the air outlet plate 122. By the cooperation of the air outlet mechanism 120 and the exhaust mechanism 340, a state where the air inside the cabinet flows downward as a whole is formed, improving the exhaust effect and uniformity inside the test cabinet 200.

[0026] Working process: In the exhaust state, the air outlet mechanism 120 blows air into the test cabinet 200. The gas in the test cabinet 200 enters the exhaust mechanism 340 through the exhaust plate 210 and the exhaust structure 320, and is discharged through the exhaust pipe 343. The air in the test cabinet 200 is updated by the cooperation of the air outlet mechanism 120 and the exhaust mechanism 340 to prevent the gas from diffusing into the external environment. When liquid is poured during the test, the liquid will enter the liquid collecting tank 330 through the liquid leakage tank 311, and then enter the collecting cylinder 352 through the liquid guiding pipe 331. After the collecting cylinder 352 is full, open the test bench 310, rotate and lift the collecting cylinder 352 according to the limit groove 354, and the collecting cylinder 352 can be taken out, so as to transfer the liquid in the collecting cylinder 352 to a professional external collecting container. The whole process is carried out in the test cabinet 200 without disassembling the machine or stopping the operation, and there will be no problem of gas diffusion during the cleaning process.

[0027] The above embodiments are the preferred implementation modes of the present invention, and are not intended to limit the present invention. Without departing from the inventive concept of the present invention, any obvious replacement is within the protection scope of the present invention.

Claims

1. A downward exhaust fume hood capable of safely collecting waste liquid, comprising an upper cabinet body (100), a test cabinet (200) located at the bottom of the upper cabinet body (100), and a lower cabinet body (300) located at the bottom of the test cabinet (200), characterized in that: An exhaust mechanism (340) is provided inside the lower cabinet body (300). Above the exhaust mechanism (340), a waste liquid collection device (350) is provided. Above the waste liquid collection device (350), a test bench (310) is provided. An exhaust structure (320) is provided around the test bench (310). An exhaust cavity (321) is provided inside the exhaust structure (320). A liquid leakage groove (311) is provided at the edge of the test bench (310). The liquid leakage groove (311) is connected to the waste liquid collection device (350). An exhaust plate (210) is provided on the inner wall of the cavity of the test cabinet (200). Exhaust openings are provided on both the exhaust structure (320) and the exhaust plate (210). Both the exhaust plate (210) and the exhaust cavity (321) are in communication with the exhaust mechanism (340). An air outlet mechanism (120) is provided inside the upper cabinet body (100).

2. The down-draft fume hood capable of safely collecting waste liquid according to claim 1, wherein: Leak holes are provided on the liquid leakage groove (311). A liquid collection groove (330) corresponding to the leak holes is provided below the liquid leakage groove (311). A liquid guide pipe (331) is provided at the bottom of the liquid collection groove (330). The liquid guide pipe (331) is connected to the waste liquid collection device (350).

3. The down-draft fume hood capable of safely collecting waste liquid according to claim 2, wherein: The waste liquid collection device (350) includes a placement bin (351). A collection cylinder (352) is provided inside the placement bin (351). A liquid inlet nozzle (353) corresponding to the liquid guide pipe (331) is provided on the side wall of the collection cylinder (352). A limiting mechanism is provided between the placement bin (351) and the collection cylinder (352).

4. The down-draft fume hood capable of safely collecting waste liquid according to claim 3, characterized in that: The limiting mechanism includes a limiting groove (354) provided on the outer wall of the collection cylinder (352). A limiting block (355) corresponding to the limiting groove (354) is provided on the inner wall of the placement bin (351).

5. The bottom-exhaust fume hood capable of safely collecting waste liquid according to claim 4, characterized in that: The exhaust mechanism (340) includes a wind collection cavity (341). Below the wind collection cavity (341), an exhaust fan (342) is provided. The outlet of the exhaust fan (342) is connected to an exhaust pipe (343). The placement bin (351) is located at the top of the wind collection cavity (341). Both the exhaust cavity (321) and the exhaust plate (210) are in communication with the wind collection cavity (341).

6. The down-draft fume hood capable of safely collecting waste liquid according to claim 5, wherein: An air inlet (110) is further provided at the top of the upper cabinet body (100). The air outlet mechanism (120) is located below the air inlet (110).

7. The down-draft fume hood capable of safely collecting waste liquid according to claim 6, wherein: The air outlet mechanism (120) includes an air outlet fan (121). Below the air outlet fan (121), an air outlet plate (122) is provided. An air outlet is provided on the air outlet plate (122). The air outlet plate (122) is located at the bottom of the upper cabinet body (100).

8. A down-draft fume hood capable of safely collecting waste liquid according to any one of claims 4-7, characterized in that: A handle is provided at the top of the collection cylinder (352).

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