Laboratory fume hood with air circulation function

Abstract

The utility model relates to the technical field of air circulation ventilation cabinets, and provides a laboratory ventilation cabinet with an air circulation function, which comprises a rack, the rack is provided with an operation cavity, an air exhaust cavity and an operation platform, the operation platform is positioned in the operation cavity, the operation cavity is provided with a plurality of air exhaust holes, and the air exhaust holes are used for connecting the operation cavity and the air exhaust cavity; the air extracting pump is arranged on the rack and used for extracting air in the operation cavity and the air extracting cavity; the purification box is arranged on the rack and is provided with a reaction cavity, and the reaction cavity is used for purifying the gas extracted by the gas extraction pump; and the heating piece is arranged in the purification box and used for heating the purification box. By means of the technical scheme, the problem that in the prior art, harmful gas can injure the atmosphere and the human body is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air circulation fume hoods, and in particular to a laboratory fume hood with an air circulation function. Background Art

[0002] Laboratory fume hoods are commonly used safety equipment in scientific research and industrial production, primarily used to control the emission of harmful gases and particulate matter, protecting operators and the environment. However, existing laboratory fume hoods, when producing gases such as CO, H2, and NH3 during experiments, directly discharge these gases into the air, potentially posing a health hazard. Some equipment also collects and dilutes these gases through a circulation system before discharging them, also causing damage to the human body and the atmosphere. These fume hoods offer limited protection for operators. Utility Model Content

[0003] The utility model provides a laboratory fume hood with an air circulation function, which solves the problem in the related art that harmful gases may cause damage to the atmosphere and human body.

[0004] The technical solution of the utility model is as follows:

[0005] A laboratory fume hood with air circulation function, comprising:

[0006] A frame having an operating cavity, an air extraction cavity, and an operating platform, wherein the operating platform is located in the operating cavity, and the operating cavity has a plurality of air extraction holes, wherein the air extraction holes are used to connect the operating cavity and the air extraction cavity;

[0007] An air pump is provided on the frame, and is used to remove gas from the operating cavity and the air extraction cavity;

[0008] A purification box is provided on the frame, wherein the purification box has a reaction cavity, and the reaction cavity is used to purify the gas extracted by the vacuum pump;

[0009] A heating element is arranged in the purification box and is used to heat the purification box.

[0010] Optionally, also include:

[0011] There are several partitions, which are spaced apart and arranged in the purification box. The partitions have through slots for passing gas, and the partitions have several grooves for placing oxidants.

[0012] Optionally, also include:

[0013] a flexible sliding plate, slidably disposed on the frame and located at the operating cavity, wherein the flexible sliding plate is used to seal or not seal the operating cavity after sliding;

[0014] A driving member is provided on the frame, and is used for driving the flexible sliding plate to slide on the frame.

[0015] Optionally, the driving member includes:

[0016] There are a plurality of sprockets, wherein the sprockets are rotatably arranged on the frame;

[0017] a counterweight plate, slidably disposed on the frame and located away from the flexible sliding plate;

[0018] There are several chains, one end of each of the chains is set on the counterweight plate, and the other end is set on the flexible sliding plate, and the chains are wound around several of the sprockets. After the sprockets rotate, they are used to drive the chains to move.

[0019] The working principle and beneficial effects of the utility model are as follows:

[0020] In the present utility model, an operating cavity, an exhaust cavity and an operating platform are provided on the frame. The operator can conduct experiments on the operating platform. The harmful gases generated by the experiment will be extracted from the operating cavity and the exhaust cavity into the purification box through the exhaust pump. The purification box is provided with an oxidant, such as CuO. When harmful gases such as CO, H2, NH3 are extracted into the purification box, the heating element starts to heat. Under high temperature conditions, CuO will react with gases such as CO, H2, NH3 to produce harmless gases such as CO2, H2O, and N2, completing the purification of the harmful gases and discharging them. After the exhaust pump extracts the harmful gases, air will enter the operating cavity to complete the gas circulation. CuO will react with these harmful gases to generate Cu, which can be generated by continuing to heat Cu and reacting with oxygen in the purification box to generate CuO, which is convenient for the evolution cycle of subsequent harmful gases, solving the problem in related technologies that harmful gases can cause damage to the atmosphere and human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0022] Figure 1 This is a schematic diagram of the structure of the utility model from the first perspective;

[0023] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;

[0024] Figure 3 This is a schematic diagram of the structure of the utility model from a third perspective;

[0025] Figure 4 Based Figure 1 Schematic diagram of the local enlarged structure at point A.

[0026] In the figure: 1. frame, 2. operating cavity, 3. exhaust cavity, 4. operating platform, 5. exhaust hole, 6. exhaust pump, 7. purification box, 8. reaction cavity, 9. heating element, 10. partition, 11. through slot, 12. groove, 13. flexible sliding plate, 14. driving element, 15. sprocket, 16. counterweight plate, 17. chain. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0028] To simplify the drawings, only the parts relevant to the utility model are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0029] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0030] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0031] Reference Figures 1 to 4 , is an embodiment of the present utility model, and proposes

[0032] A laboratory fume hood with air circulation function, comprising:

[0033] The frame 1 has an operating cavity 2, an exhaust cavity 3 and an operating platform 4. The operating platform 4 is located in the operating cavity 2. The operating cavity 2 has a plurality of exhaust holes 5. The exhaust holes 5 are used to connect the operating cavity 2 and the exhaust cavity 3.

[0034] An air pump 6 is provided on the frame 1 and is used to remove gas from the operating cavity 2 and the air extraction cavity 3;

[0035] The purification box 7 is arranged on the frame 1 and has a reaction cavity 8. The reaction cavity 8 is used to purify the gas extracted by the vacuum pump 6;

[0036] The heating element 9 is disposed in the purification box 7 and is used to heat the purification box 7 .

[0037] In this embodiment, an operating cavity 2, an exhaust cavity 3 and an operating platform 4 are provided on the frame 1. The operator can conduct experiments on the operating platform 4. The harmful gases generated by the experiment will be extracted from the operating cavity 2 and the exhaust cavity 3 into the purification box 7 through the exhaust pump 6. The purification box 7 is provided with an oxidant, such as CuO. When harmful gases such as CO, H2, NH3 are extracted into the purification box 7, the heating element 9 starts heating. Under high temperature conditions, CuO will react with gases such as CO, H2, NH3 to produce harmless gases such as CO2, H2O, and N2, completing the purification of the harmful gases and discharging them. After the exhaust pump 6 extracts the harmful gases, air will enter the operating cavity 2, completing the gas circulation, and CuO will react with these harmful gases to generate Cu. By continuing to heat Cu and reacting with oxygen in the purification box 7, CuO is generated, which facilitates the evolution cycle of subsequent harmful gases, solving the problem in the related art that harmful gases can cause damage to the atmosphere and human body.

[0038] Optionally, also include:

[0039] There are several partitions 10, which are spaced apart and arranged in the purification box 7. The partitions 10 have through slots 11 for passing gas, and the partitions 10 have several grooves 12 for placing oxidants.

[0040] In this embodiment, a plurality of partitions 10 are provided in the purification box 7. The plurality of partitions 10 have through grooves 11, which allow the gas to circulate between the plurality of partitions 10, and a plurality of grooves 12 are provided on the plurality of partitions 10. The grooves 12 are used to place the oxidant, thereby increasing the contact area between the harmful gas and the oxidant. The increase in the contact area can effectively improve the efficiency and integrity of the harmful gas purification.

[0041] Optionally, also include:

[0042] A flexible sliding plate 13 is slidably disposed on the frame 1 and located at the operating cavity 2. After sliding, the flexible sliding plate 13 is used to seal or unseal the operating cavity 2.

[0043] The driving member 14 is provided on the frame 1 and is used to drive the flexible sliding plate 13 to slide on the frame 1 .

[0044] In this embodiment, in order to further protect the operating personnel, a flexible sliding plate 13 is provided at the operating cavity 2. The flexible sliding plate 13 can slide in the operating cavity 2. The flexible sliding plate 13 is transparent and can be automatically raised and lowered by controlling the driving member 14 through the control panel and the gas concentration detector, thereby further protecting the operating personnel.

[0045] Optionally, the driving member 14 includes:

[0046] There are a plurality of sprockets 15, and the plurality of sprockets 15 are rotatably arranged on the frame 1;

[0047] The counterweight plate 16 is slidably disposed on the frame 1 and is located away from the flexible sliding plate 13;

[0048] There are several chains 17, each of which has one end set on the counterweight plate 16 and the other end set on the flexible sliding plate 13, and the chain 17 is wound around several sprockets 15. After the sprocket 15 rotates, it is used to drive the chain 17 to move.

[0049] In this embodiment, the driving member 14 of this scheme is provided with multiple sprockets 15, the sprockets 15 are rotatably set on the frame 1, and the chain 17 is set between the counterweight plate 16 and the flexible sliding plate 13. When the chain 17 slides on the sprocket 15, it can drive the flexible sliding plate 13 to slide on the frame 1 to complete the opening or closing of the operating cavity 2, and when the sprocket 15 is not driven, the chain 17 can be driven by the weight of the counterweight plate 16 to move on the sprocket 15 to complete the opening and closing of the operating cavity 2, thereby facilitating the operation of the flexible sliding plate 13.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A laboratory fume hood with air circulation function, characterized in that: include: A frame (1), the frame (1) having an operating cavity (2), an air extraction cavity (3) and an operating platform (4), the operating platform (4) being located in the operating cavity (2), the operating cavity (2) having a plurality of air extraction holes (5), the air extraction holes (5) being used to connect the operating cavity (2) and the air extraction cavity (3); An air extraction pump (6) is arranged on the frame (1), and the air extraction pump (6) is used to extract gas from the operating cavity (2) and the air extraction cavity (3); A purification box (7) is arranged on the frame (1), the purification box (7) having a reaction cavity (8), and the reaction cavity (8) is used to purify the gas extracted by the vacuum pump (6); A heating element (9) is arranged in the purification box (7), and the heating element (9) is used to heat the purification box (7).

2. A laboratory fume hood with air circulation function according to claim 1, characterized in that: Also includes: There are a plurality of partitions (10), and the plurality of partitions (10) are arranged at intervals in the purification box (7). The partitions (10) have through slots (11), and the through slots (11) are used for passing gas. The partitions (10) have a plurality of grooves (12), and the grooves (12) are used for placing oxidants.

3. A laboratory fume hood with air circulation function according to claim 2, characterized in that: Also includes: A flexible sliding plate (13) is slidably arranged on the frame (1) and is located at the operating cavity (2); after the flexible sliding plate (13) slides, it is used to seal or not seal the operating cavity (2); A driving member (14) is provided on the frame (1), and the driving member (14) is used to drive the flexible sliding plate (13) to slide on the frame (1).

4. A laboratory fume hood with air circulation function according to claim 3, characterized in that: The driving member (14) comprises: There are a plurality of sprockets (15), wherein the plurality of sprockets (15) are rotatably arranged on the frame (1); a counterweight plate (16) slidably disposed on the frame (1) and located on a side away from the flexible sliding plate (13); There are a plurality of chains (17), each of which has one end arranged on the counterweight plate (16) and the other end arranged on the flexible sliding plate (13), and the chain (17) is wound around a plurality of sprockets (15). When the sprockets (15) rotate, they are used to drive the chain (17) to move.

Images