Laboratory ventilation circulating filtering device

Abstract

The utility model discloses a laboratory ventilation circulating filtering device which comprises a working table, a filtering box is fixedly connected to the upper portion of the working table, a frame is fixedly connected to the front portion of the filtering box, a sealing plate is connected to the interior of the frame in a sliding mode, and a locking device is arranged on the right side of the frame. An air inlet box is fixedly connected to the upper portion of the filter box, an air inlet is formed in the front of the air inlet box, a first one-way air inlet valve is fixedly connected to the upper portion of the filter box, a suction fan is fixedly connected to the left side of the filter box, an exhaust port is formed in the front of the suction fan, and an air inlet frame is fixedly connected to the input end of the suction fan. By means of the structure, circulating gas can be prevented from flowing out of the gas inlet in the circulating filtration process, the circulating gas can be prevented from flowing out of the gas outlet before reaching the standard, meanwhile, external gas can be prevented from entering from the gas inlet in the circulating filtration process, and better circulating filtration is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of circulating filter device, especially in a kind of laboratory ventilation circulating filter device. BACKGROUND

[0002] Laboratory refers to the specific place for scientific research, technical development, teaching experiment or product test, is equipped with professional instrument and equipment, experimental material and standardization environmental condition, to meet the experimental needs of different disciplines or industry.Its core functions include data acquisition, phenomenon observation, theory verification and process optimization etc.Laboratory is the basic platform of innovation research, and is also the important carrier of cultivating practical ability, and its design needs to consider functionality, safety and expansibility, and is the indispensable infrastructure of modern science and technology development.

[0003] In the prior art, part of the filter device in the process of use, the gas obtained after single filtering in laboratory does not reach the standard, so that part of the device adopts the way of circulating filtering to make the finally obtained gas reach the standard of emission, but in the prior art, part of the circulating filter device in the process of use, gas in the circulating process is easy to flow out from the air inlet, reduce the filtering effect, or external gas is easy to flow into from the air inlet, which causes certain influence to the overall filtration, and is not conducive to better filtration of gas. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of laboratory ventilation circulating filter device, can prevent gas in the process of circulating filtration, circulating gas flows out from air inlet, and circulating gas flows out from air outlet before reaching the standard, while can prevent external gas from entering from air inlet in the process of circulating filtration, realize better circulating filtration.

[0005] To achieve the above object, provide a kind of laboratory ventilation circulating filter device, including workbench, the upper portion of workbench is fixedly connected with filter box, the front of filter box is fixedly connected with frame body, the inside of frame body is slidably connected with sealing plate, the right side of frame body is provided with locking device, the upper portion of filter box is fixedly connected with air inlet box, the front of air inlet box is provided with air inlet, the upper portion of filter box is fixedly connected with first one-way air inlet valve, the left side of filter box is fixedly connected with air suction fan, the front of air suction fan is provided with exhaust port, the input end of air suction fan is fixedly connected with air inlet frame;

[0006] The inside of filter box is fixedly connected with sliding frame on left and right sides, the upper portion of sliding frame is slidably connected with first filter layer, the middle part of sliding frame is slidably connected with second filter layer, the lower portion of sliding frame is slidably connected with third filter layer.

[0007] According to the laboratory ventilation circulation filtering device, the right side of the frame body is provided with a lock hole on the upper side and the lower side, and the inside of the sealing plate is provided with an observation window.

[0008] According to the laboratory ventilation circulation filtering device, the middle part of the air inlet frame is fixedly connected with a blocking groove, and the inside of the air inlet frame is rotatably connected with a blocking plate.

[0009] According to the laboratory ventilation circulation filtering device, the upper side of the sliding frame is slidably connected with a filtering frame, the front side of the filtering frame is provided with a slot, the middle part of the slot is fixedly connected with a handle, the bottom of the filtering frame is fixedly connected with a filter screen, and the upper side of the filter screen is provided with filter cotton.

[0010] According to the laboratory ventilation circulation filtering device, the front side of the first filter layer is provided with a dismounting groove, the front side of the second filter layer is provided with a dismounting groove, and the front side of the third filter layer is provided with a dismounting groove.

[0011] According to the laboratory ventilation circulation filtering device, the left side of the filtering box is fixedly connected with a backflow air pump, the output end of the backflow air pump is fixedly connected with a first connecting pipe, the other end of the first connecting pipe is fixedly connected with a one-way air exhaust valve, the input end of the backflow air pump is fixedly connected with a second connecting pipe, the other end of the second connecting pipe is fixedly connected with a second one-way air inlet valve, the left side of the filtering box is fixedly connected with an air detector, and the left side of the filtering box is fixedly connected with a controller.

[0012] According to the laboratory ventilation circulation filtering device, the controller is electrically connected with the air detector, the controller is electrically connected with the backflow air pump, and the controller is electrically connected with the air suction fan.

[0013] According to the laboratory ventilation circulation filtering device, the locking device comprises a locking rod, locking springs are fixedly connected to the upper side and the lower side of the locking rod, a sliding block is fixedly connected to the other end of the locking spring, a lock pin is fixedly connected to the other end of the sliding block, sliding grooves are formed in the upper side and the lower side of the right side of the locking rod, and the sliding block is slidably connected with the locking rod.

[0014] The utility model has the advantages of the following beneficial effects:

[0015] 1、Compared with the prior art, by setting the first one-way air inlet valve, the gas in the filter box will not flow out from the first one-way air inlet valve during the process of circulating filtration; by setting the air inlet frame, the air inlet frame is fixedly connected with the blocking groove in the inside, and the blocking plate is rotatably connected above the air inlet frame, so that the blocking plate tightly abuts against the blocking groove under the action of suction during the process of circulating filtration, at this time, the external gas will not enter the inside of the filter box from the exhaust port in reverse, and cooperating with the effects of the one-way exhaust valve and the second one-way air inlet valve, the circulating gas will not flow out from the air inlet, and the circulating gas will not flow out from the air outlet before reaching the standard, and the external gas can be prevented from entering from the air inlet during the process of circulating filtration, so that better circulating filtration is realized.

[0016] 2、Compared with the prior art, the upper and lower sliders are simultaneously moved to the middle part, the locking rod can be taken out from the right side of the frame body, at this time, the operator can take out the sealing plate, and then the operator can conveniently replace the filter layer. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further explained in connection with the drawings and embodiments;

[0018] Figure 1 It is a perspective view of the laboratory ventilation circulating filtration device of the utility model;

[0019] Figure 2 It is an internal structure schematic view of the laboratory ventilation circulating filtration device of the utility model;

[0020] Figure 3 It is a blocking plate perspective view of the laboratory ventilation circulating filtration device of the utility model;

[0021] Figure 4 It is a filter cotton and filter screen separation schematic view of the laboratory ventilation circulating filtration device of the utility model;

[0022] Figure 5 It is an internal structure schematic view of the locking device of the laboratory ventilation circulating filtration device of the utility model;

[0023] Figure 6 It is a circuit principle diagram of the laboratory ventilation circulating filtration device of the utility model.

[0024] LEGEND:

[0025] 1, workbench; 2, filter box; 3, frame; 4, lock hole; 5, sealing plate; 6, observation window; 7, locking device; 8, air inlet box; 9, air inlet; 10, first one-way air inlet valve; 11, air suction fan; 12, air outlet; 13, air inlet frame; 14, blocking groove; 15, baffle; 16, filter frame; 17, slot; 18, handle; 19, filter screen; 20, filter cotton; 21, sliding frame; 22, first filter layer; 23, second filter layer; 24, third filter layer; 25, disassembly groove; 26, backflow air pump; 27, first connecting pipe; 28, one-way air outlet valve; 29, second connecting pipe; 30, second one-way air inlet valve; 31, air detector; 32, controller;

[0026] 71, locking rod; 72, locking spring; 73, sliding block; 74, locking pin; 75, sliding groove. DETAILED DESCRIPTION

[0027] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0028] Reference Figures 1-6The utility model discloses an experimental laboratory ventilation circulation filter device, its including workbench 1, the upper fixed connection of workbench 1 has filter box 2, the front fixed connection of filter box 2 has frame body 3, the inside slide connection of frame body 3 has sealing plate 5, the right side upper and lower sides of frame body 3 are opened to have lock hole 4, the inside of sealing plate 5 is provided with observation window 6, the right side of frame body 3 is provided with locking device 7, the upper fixed connection of filter box 2 has air inlet box 8, the front of air inlet box 8 is opened to have air inlet 9, the upper fixed connection of filter box 2 has first one-way air inlet valve 10, the left side fixed connection of filter box 2 has air suction fan 11, the front of air suction fan 11 is provided with exhaust port 12, the input of air suction fan 11 is fixedly connected with air inlet frame 13, the middle fixed connection of air inlet frame 13 has the blocking groove 14, the inside upper rotation of air inlet frame 13 is connected with baffle 15, baffle 15 is in contact with blocking groove 14, the upper slide connection of sliding frame 21 has filter frame 16, the front of filter frame 16 is opened to have slot 17, the middle fixed connection of slot 17 has handle 18, the bottom fixed connection of filter frame 16 has filter screen 19, the upper of filter screen 19 is provided with filter cotton 20, the inside left and right sides fixed connection of filter box 2 has sliding frame 21, the upper slide connection of sliding frame 21 has first filter layer 22, the middle slide connection of sliding frame 21 has second filter layer 23, the lower slide connection of sliding frame 21 has third filter layer 24, the front of first filter layer 22 is opened to have dismounting groove 25, the front of second filter layer 23 is opened to have dismounting groove 25, the front of third filter layer 24 is opened to have dismounting groove 25.

[0029] The above structure, by being provided with frame body 3, and the inside slide connection of frame body 3 has sealing plate 5, and the middle of sealing plate 5 is provided with observation window 6, so that the operator can observe the gas filtration situation through observation window 6, and the first filter layer 22, second filter layer 23 and third filter layer 24's own situation.

[0030] By being provided with first one-way air inlet valve 10, and when the device is opened in air suction fan 11, gas can enter the inside of filter box 2 through air inlet 9 and first one-way air inlet valve 10, when air suction fan 11 is closed, and reflux gas pump 26 is opened, external gas will not enter from first one-way air inlet valve 10, and the gas in the inside of filter box 2 will not flow out from first one-way air inlet valve 10.

[0031] By being provided with air inlet frame 13, and the inside fixed connection of air inlet frame 13 has blocking groove 14, the upper rotation of air inlet frame 13 has baffle 15, so that when the device is opened in air suction fan 11, gas enters the inside of air inlet frame 13 from the inside of filter box 2 and finally flows out from exhaust port 12, when air suction fan 11 is closed, and reflux gas pump 26 is opened, at this time, baffle 15 is in close contact with blocking groove 14 by the action of suction, at this time, external gas will not enter the inside of filter box 2 from exhaust port 12 reversely.

[0032] By being provided with the filter frame 16, and the front of the filter frame 16 is provided with the slot 17, the middle of the slot 17 is fixedly connected with the handle 18, so that the operator can take out the filter frame 16 through the handle 18, and the bottom of the filter frame 16 is fixedly connected with the filter screen 19, and the upper side of the filter screen 19 is provided with the filter cotton 20, so that the filter screen 19 and the filter cotton 20 can filter larger granular pollutants.

[0033] By being provided with the first filter layer 22, the first filter layer 22 is a HEPA filter core, and the core advantage is that the filtering capacity is very strong, and more than 99.97% of 0.3 microns of particulate matter can be intercepted, and the resistance is low and the dust capacity is large. The material of the HEPA filter core is mostly glass fiber or polypropylene, which has the characteristics of non-toxic, good temperature resistance and not easy to age, so that the HEPA is used as the first filter layer 22.

[0034] By being provided with the second filter layer 23, the second filter layer 23 is a ceramic filter core, and the ceramic filter core has significant advantages in gas filtration, especially suitable for high-temperature, corrosive and high-precision scenes. Its high-temperature resistance of 800~1600℃ far exceeds other materials, and can be stably used for high-temperature flue gas or industrial waste gas treatment; strong chemical stability, resistant to strong acid, strong base and organic solvent; high mechanical strength, high pressure flushing and long service life, supporting backwashing regeneration, reducing long-term cost; flexible filtration precision 0.1~50μm, can efficiently intercept particulate matter and even microorganisms. Therefore, the ceramic filter core is used as the second filter layer 23.

[0035] By being provided with the third filter layer 24, the third filter layer 24 is an activated carbon filter core, and the core advantage of the activated carbon filter core is its strong adsorption capacity. Through the highly developed pore structure, it can effectively remove organic gases, odors such as formaldehyde or benzene series, some harmful chemical substances and some liquid impurities in the air. It has good chemical stability, acid and alkali corrosion resistance, and can be optimized by selecting specific materials such as coconut shell, coal, and other specific materials of activated carbon for different pollutants. Therefore, the activated carbon filter core is used as the third filter layer 24.

[0036] By being provided with the dismounting groove 25, the operator can more conveniently dismount the first filter layer 22, the second filter layer 23 and the third filter layer 24.

[0037] The left middle part of the filter box 2 is fixedly connected with a backflow air pump 26, the output end of the backflow air pump 26 is fixedly connected with a first connecting pipe 27, the other end of the first connecting pipe 27 is fixedly connected with a one-way air exhaust valve 28, the input end of the backflow air pump 26 is fixedly connected with a second connecting pipe 29, the other end of the second connecting pipe 29 is fixedly connected with a second one-way air inlet valve 30, the lower left side of the filter box 2 is fixedly connected with an air detector 31, the upper left side of the filter box 2 is fixedly connected with a controller 32, the controller 32 is electrically connected with the air detector 31, the controller 32 is electrically connected with the backflow air pump 26, and the controller 32 is electrically connected with the air suction fan 11.

[0038] The above structure, through the driving of the backflow air pump 26, makes the gas at the bottom of the filter box 2 re-enter the upper part of the filter box 2 from the second connecting pipe 29 and the first connecting pipe 27, and circulates, so as to realize the circulating filtration of the gas.

[0039] The locking device 7 comprises a locking rod 71, the upper and lower sides of the locking rod 71 are fixedly connected with locking springs 72, the other end of the locking spring 72 is fixedly connected with a sliding block 73, the other end of the sliding block 73 is fixedly connected with a locking pin 74, the upper and lower sides of the right side of the locking rod 71 are provided with sliding grooves 75, and the sliding block 73 is in sliding connection with the locking rod 71.

[0040] The above structure is provided with the locking rod 71, and the locking rod 71 is in sliding connection with the frame 3, so that the locking rod 71 can abut against the sealing plate 5, preventing the sealing plate 5 from being separated from the frame 3 during the filtration process; by simultaneously moving the sliding blocks 73 on the upper and lower sides to the middle part, the locking springs 72 on the upper and lower sides are contracted, and the locking pins 74 on the upper and lower sides enter the inside of the locking rod 71, at this time, the operator can insert the locking rod 71 into the right side of the frame 3, and after releasing the hand, the locking pins 74 on the upper and lower sides enter the inside of the lock holes 4 on the upper and lower sides under the resetting action of the locking springs 72 on the upper and lower sides, so as to realize the locking of the sealing plate 5; similarly, by simultaneously moving the sliding blocks 73 on the upper and lower sides to the middle part, the locking rod 71 can be taken out from the right side of the frame 3, at this time, the operator can take out the sealing plate 5, thereby facilitating the operator to replace the filter layer.

[0041] Working principle: When using this laboratory ventilation circulation filtration device, the exhaust fan 11 is first turned on via the controller 32. At this time, the gas inside the laboratory enters through the air inlet 9 and is filtered through the filter screen 19, filter cotton 20, first filter layer 22, second filter layer 23, and third filter layer 24. If the gas filtration meets the standards, the gas is discharged from the exhaust port 12. If the gas does not meet the standards, the air detector 31 sends an electrical signal to the controller 32, and the controller 32 turns off the exhaust fan 11 and turns on the return air pump 26. Under the action of the return air pump 26, the gas is filtered again. After meeting the standards, the air detector 31 sends an electrical signal to the controller 32, and the controller 32 turns on the exhaust fan 11 and turns off the return air pump 26, thereby realizing the circulation filtration of the gas.

[0042] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A laboratory ventilation circulation and filtration device, characterized in that, The system includes a workbench (1), a filter box (2) fixedly connected above the workbench (1), a frame (3) fixedly connected to the front of the filter box (2), a sealing plate (5) slidably connected inside the frame (3), a locking device (7) provided on the right side of the frame (3), an air inlet box (8) fixedly connected above the filter box (2), an air inlet (9) provided in front of the air inlet box (8), a first one-way air inlet valve (10) fixedly connected above the filter box (2), a suction fan (11) fixedly connected to the left side of the filter box (2), an exhaust port (12) provided in front of the suction fan (11), and an air inlet frame (13) fixedly connected to the input end of the suction fan (11). The filter box (2) has a sliding frame (21) fixedly connected to the left and right sides inside. A first filter layer (22) is slidably connected above the sliding frame (21), a second filter layer (23) is slidably connected to the middle of the sliding frame (21), and a third filter layer (24) is slidably connected to the bottom of the sliding frame (21).

2. The laboratory ventilation circulation filtration device according to claim 1, characterized in that, The frame (3) has lock holes (4) on the upper and lower right sides, and the sealing plate (5) has an observation window (6) inside.

3. The laboratory ventilation circulation and filtration device according to claim 1, characterized in that, A baffle (14) is fixedly connected to the middle of the air intake frame (13), and a baffle (15) is rotatably connected to the upper part of the air intake frame (13), with the baffle (15) abutting against the baffle (14).

4. A laboratory ventilation circulation filtration device according to claim 1, characterized in that, A filter frame (16) is slidably connected above the sliding frame (21). A slot (17) is provided in front of the filter frame (16). A handle (18) is fixedly connected in the middle of the slot (17). A filter screen (19) is fixedly connected to the bottom of the filter frame (16). A filter cotton (20) is provided above the filter screen (19).

5. A laboratory ventilation circulation filtration device according to claim 1, characterized in that, The first filter layer (22) has a disassembly groove (25) in front, the second filter layer (23) has a disassembly groove (25) in front, and the third filter layer (24) has a disassembly groove (25) in front.

6. A laboratory ventilation circulation filtration device according to claim 1, characterized in that, A return air pump (26) is fixedly connected to the middle left side of the filter box (2). A first pipe (27) is fixedly connected to the output end of the return air pump (26). A one-way exhaust valve (28) is fixedly connected to the other end of the first pipe (27). A second pipe (29) is fixedly connected to the input end of the return air pump (26). A second one-way air inlet valve (30) is fixedly connected to the other end of the second pipe (29). An air detector (31) is fixedly connected to the lower left side of the filter box (2). A controller (32) is fixedly connected to the upper left side of the filter box (2).

7. A laboratory ventilation circulation filtration device according to claim 6, characterized in that, The controller (32) is electrically connected to the air detector (31), the controller (32) is electrically connected to the return air pump (26), and the controller (32) is electrically connected to the suction fan (11).

8. A laboratory ventilation circulation filtration device according to claim 1, characterized in that, The locking device (7) includes a locking rod (71), with locking springs (72) fixedly connected to the upper and lower sides of the locking rod (71), and a slider (73) fixedly connected to the other end of the locking spring (72). A locking pin (74) is fixedly connected to the other end of the slider (73). Slide grooves (75) are provided on the upper and lower sides of the right side of the locking rod (71), and the slider (73) is slidably connected to the locking rod (71).

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