Exhaust gas circulating and filtering device for fume hood

Abstract

The utility model relates to the technical field of waste gas circulating filtration, in particular to a waste gas circulating filtration device for a fume hood, which improves the purification effect of waste gas, reduces the influence of external air in a hood body and reduces the cleaning complexity of a first filter screen by personnel. Comprising a cabinet body and a net plate, and the net plate is installed on the inner side wall of the cabinet body; the cover body is installed on the inner side wall of the cabinet body, the top end of the cover body is communicated with the screen plate, the first cylinder body is installed on the lower portion of the inner side wall of the cabinet body, the top end of the first cylinder body is communicated with the bottom end of the cover body, the first filter screen is installed on the inner side wall of the first cylinder body, and the lower portion of the first cylinder body is communicated with the filter device; the filtering device is used for sucking air into the first barrel, the filtering device is used for purifying the waste gas and then returning and conveying the waste gas into the cabinet body, and the cleaning device is arranged in the first barrel and used for cleaning the first filter screen.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas circulation filtering, in particular to a fume hood waste gas circulation filtering device. Background Art

[0002] In the fields of scientific research, pharmaceuticals, chemical experiments and industrial production, fume hoods, as important laboratory and production equipment, bear the important responsibility of protecting experimental personnel and the environment from harmful gases and microorganisms.

[0003] For example, the patent with prior art authorization announcement number CN208944796U discloses a laboratory fume hood with a purification system, including a fume hood and a purification system; the fume hood and the purification system are connected through an exhaust gas emission system, and the exhaust gas emission system includes an air collecting hood located in the fume hood, an air supply pipe connected to the air collecting hood, and an air intake hood connected to the air supply pipe and placed in the purification system. The purification system includes a purification box and a spray assembly. The air intake hood extends into the purification box and a gas dispersion hood is fixed to its end. The spray assembly is located in the upper half of the inner cavity of the purification box.

[0004] However, when the fume hood was purifying the exhaust gas, it was found that the fume hood was not convenient for recycling the purified air, which could easily cause the cabinet to be affected by the external air, reducing the convenience of use. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a fume hood exhaust gas circulation filtration device which improves the purification effect of exhaust gas, reduces the influence of external air on the cabinet body, and reduces the complexity of personnel cleaning the first filter.

[0006] The utility model discloses an exhaust gas circulation filter device for a fume hood, comprising a cabinet body and a mesh plate, wherein the mesh plate is mounted on the inner wall of the cabinet body; the utility model also comprises a filter device, a cleaning device, a cover body, a first cylinder body and a first filter screen, the cover body is mounted on the inner wall of the cabinet body, the top end of the cover body is communicated with the mesh plate, the first cylinder body is mounted on the lower inner wall of the cabinet body, the top end of the first cylinder body is communicated with the bottom end of the cover body, the first filter screen is mounted on the inner wall of the first cylinder body, the lower part of the first cylinder body is communicated with the filter device, the filter device is used to inhale air into the first cylinder body, and the filter device is used to return the exhaust gas after purification treatment to the cabinet body, the cleaning device is arranged in the first cylinder body, and the cleaning device is arranged in the first cylinder body. The device is used to clean the first filter; the first cylinder is sucked into the air through the filter device, and the first cylinder is made to suck into the cabinet through the cover, so that the exhaust gas in the cabinet enters the first cylinder, and the large particles of dirt in the exhaust gas are filtered and processed through the first filter, and then the filtered exhaust gas is transported to the filter device for secondary filtration to improve the purification effect of the exhaust gas, and then the purified exhaust gas flows back into the cabinet, so that the exhaust gas is circulated in the cabinet, reducing the influence of the external air on the cabinet, and by turning on the cleaning device, the cleaning device cleans and discharges the dirt on the first filter, reducing the complexity of personnel cleaning.

[0007] The motor is driven by the motor to rotate the connecting pipe, so that the connecting pipe drives the suction box to move circumferentially, thereby improving the convenience of cleaning different positions of the top surface of the first filter screen.

[0008] Preferably, the filtering device includes a second cylinder, a delivery pipe, a third cylinder, a fan, multiple groups of annular tubes and a water pump. Purified water is provided in the lower part of the second cylinder. The input end of the delivery pipe is connected to the first cylinder, the output end of the delivery pipe is connected to the second cylinder, the third cylinder is connected and arranged on the upper part of the second cylinder, the input end of the fan is connected to the third cylinder, the output end of the fan is connected to the cabinet, the multiple groups of annular tubes are installed on the inner wall of the third cylinder, the outer wall of the multiple groups of annular tubes is provided with a nozzle, the nozzle is connected to the inside of the third cylinder, the input end of the water pump is connected to the second cylinder The output end of the water pump is connected to multiple groups of annular pipes through pipelines; by turning on the fan to suck air into the third cylinder, the second cylinder extracts the exhaust gas in the first cylinder through the delivery pipe, and the extracted exhaust gas enters the second cylinder and flows from bottom to top into the third cylinder. By turning on the water pump, the purified water in the second cylinder is extracted, and the extracted purified water is atomized and discharged from top to bottom through the nozzle, so that the exhaust gas and the water mist form convection, and the water mist removes dust and purifies the exhaust gas. After that, the exhaust gas flows back to the cabinet through the fan, thereby improving the convenience of exhaust gas purification circulation and transportation.

[0009] Preferably, it also includes a filter box and a second filter screen, the filter box input end is connected to the second cylinder, the second filter screen is installed on the inner wall of the filter box, and the water pump input end is connected to the filter box; the purified water in the second cylinder flows into the interior of the filter box, and is filtered through the second filter screen, so that the filtered purified water is extracted and used by the water pump, thereby improving the cleaning effect of the purified water.

[0010] Preferably, an activated carbon layer is further included, and the activated carbon layer is arranged inside the third cylinder; the waste gas is adsorbed and purified by the activated carbon layer, thereby further improving the purification effect of the waste gas.

[0011] Preferably, a grille is also included, which is installed on the inner wall of the cabinet and is arranged above the mesh plate; by setting the grille, the situation where items in the cabinet are placed directly on the mesh plate to block the ventilation holes is avoided, thereby improving the smoothness of the exhaust gas circulation and transportation.

[0012] Preferably, an air detector is provided inside the cabinet to improve the convenience of air detection inside the cabinet.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the first cylinder is sucked into the air through the filter device, and the first cylinder sucks into the cabinet through the cover, so that the exhaust gas in the cabinet enters the first cylinder, and the large particles of dirt in the exhaust gas are filtered and processed through the first filter net, and then the filtered exhaust gas is transported to the filter device for secondary filtration, thereby improving the purification effect of the exhaust gas, and then the purified exhaust gas flows back into the cabinet, so that the exhaust gas is circulated and transported in the cabinet, reducing the influence of external air on the cabinet, and by turning on the cleaning device, the cleaning device cleans and discharges the dirt on the first filter net, reducing the complexity of personnel cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is an axonometric structural diagram of the present utility model;

[0015] Figure 2 This is an axonometric structural diagram of the connection between the first cylinder and the conveying pipe, etc.;

[0016] Figure 3 It is an axonometric structural diagram of the connection between the first cylinder and the first filter screen;

[0017] Figure 4 This is a schematic diagram of the partial axonometric structure of the connection between the cover body and the first cylinder body;

[0018] Figure 5 It is an axonometric partial structural diagram of the connection between the connecting pipe and the suction box, etc.

[0019] Markings in the accompanying drawings: 1. Cabinet; 2. Mesh plate; 3. Cover; 4. First cylinder; 5. First filter; 6. Bracket; 7. Delivery box; 8. Connecting pipe; 9. Suction box; 10. Motor; 11. Vacuum cleaner; 12. Second cylinder; 13. Delivery pipe; 14. Third cylinder; 15. Fan; 16. Annular pipe; 17. Water pump; 18. Filter box; 19. Second filter; 20. Activated carbon layer; 21. Grille. DETAILED DESCRIPTION

[0020] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0021] Example 1

[0022] like Figures 1 to 5 As shown, a fume hood exhaust gas circulation filter device of the present invention includes a cabinet 1 and a mesh plate 2, the mesh plate 2 is mounted on the inner wall of the cabinet 1; it also includes a filtering device, a cleaning device, a cover 3, a first cylinder 4 and a first filter 5, the cover 3 is mounted on the inner wall of the cabinet 1, the top of the cover 3 is communicated with the mesh plate 2, the first cylinder 4 is mounted on the lower part of the inner wall of the cabinet 1, the top of the first cylinder 4 is communicated with the bottom end of the cover 3, the first filter 5 is mounted on the inner wall of the first cylinder 4, and the lower part of the first cylinder 4 is communicated with the filtering device, the filtering device is used to inhale air into the first cylinder 4, and the filtering device is used to reflux the exhaust gas after purification and transport it into the cabinet 1, the cleaning device is arranged in the first cylinder 4, and the cleaning device is used to clean the first filter 5;

[0023] like Figure 4 and Figure 5As shown, the cleaning device includes a bracket 6, a conveying box 7, a connecting pipe 8, an air suction box 9, a motor 10 and a dust collector 11. The bracket 6 is mounted on the inner wall of the first cylinder 4, the conveying box 7 is mounted on the top of the bracket 6, the upper part of the connecting pipe 8 is rotatably mounted on the inside of the conveying box 7, and the upper part of the connecting pipe 8 is communicated with the inside of the conveying box 7, the air suction box 9 is communicated and arranged at the lower part of the outer wall of the connecting pipe 8, the bottom end of the air suction box 9 is provided with an air suction groove, the bottom end of the air suction box 9 is close to the top surface of the first filter 5, the motor 10 is mounted on the top of the conveying box 7, the output end of the motor 10 is connected to the top end of the connecting pipe 8, and the input end of the dust collector 11 is communicated with the inside of the conveying box 7;

[0024] In this embodiment, the first cylinder 4 is sucked into the air through the filtering device, and the first cylinder 4 sucks into the cabinet 1 through the cover 3, so that the exhaust gas in the cabinet 1 enters the first cylinder 4, and the large particles of dirt in the exhaust gas are filtered and processed through the first filter 5. The filtered exhaust gas is then transported to the filtering device for secondary filtration to improve the purification effect of the exhaust gas. The purified exhaust gas is then returned to the cabinet 1, so that the exhaust gas is circulated and transported in the cabinet 1, reducing the influence of the external air on the cabinet 1. By turning on the cleaning device, the cleaning device cleans and discharges the dirt on the first filter 5, reducing the complexity of personnel cleaning.

[0025] Example 2

[0026] On the basis of Example 1, Figure 3 As shown, a fume hood exhaust gas circulation filtering device of the present invention comprises a second cylinder 12, a delivery pipe 13, a third cylinder 14, a fan 15, multiple groups of annular pipes 16 and a water pump 17. Purified water is provided in the lower part of the second cylinder 12, the input end of the delivery pipe 13 is communicated with the first cylinder 4, the output end of the delivery pipe 13 is communicated with the second cylinder 12, the third cylinder 14 is communicated and arranged at the upper part of the second cylinder 12, the input end of the fan 15 is communicated with the third cylinder 14, the output end of the fan 15 is communicated with the cabinet 1, the multiple groups of annular pipes 16 are all installed on the inner wall of the third cylinder 14, the outer wall of the multiple groups of annular pipes 16 is provided with a nozzle, the nozzle is communicated with the inside of the third cylinder 14, the input end of the water pump 17 is communicated with the second cylinder 12, and the output end of the water pump 17 is communicated with the multiple groups of annular pipes 16 through a pipeline;

[0027] like Figure 3 As shown, it also includes a filter box 18 and a second filter screen 19. The input end of the filter box 18 is connected to the second cylinder 12. The second filter screen 19 is installed on the inner wall of the filter box 18. The input end of the water pump 17 is connected to the filter box 18.

[0028] like Figure 3 As shown, it also includes an activated carbon layer 20, which is arranged inside the third cylinder 14;

[0029] like Figure 3 As shown, it also includes a grille 21, which is installed on the inner wall of the cabinet 1 and is arranged above the mesh plate 2;

[0030] like Figure 1 As shown, the cabinet 1 is connected to an air detector;

[0031] In this embodiment, the conveying box 7 is sucked by the vacuum cleaner 11, and the conveying box 7 sucks air into the suction box 9 through the connecting pipe 8, so that the suction box 9 absorbs the dirt on the first filter 5 through the suction groove, and the absorbed dirt is transported into the vacuum cleaner 11 through the conveying box 7 and the connecting pipe 8 for storage, thereby improving the convenience of automatic cleaning of the dirt on the first filter 5. The motor 10 drives the connecting pipe 8 to rotate, so that the connecting pipe 8 drives the suction box 9 to move circumferentially, thereby improving the convenience of cleaning different positions on the top surface of the first filter 5. By turning on the fan 15 to suck air into the third cylinder 14, the second cylinder 12 extracts the exhaust gas in the first cylinder 4 through the delivery pipe 13, and the extracted exhaust gas enters the second cylinder 12 and flows from bottom to top into the third cylinder 14. By turning on the water pump 17, purified water in the second cylinder 12 is extracted, and the extracted purified water is atomized and discharged from top to bottom through the nozzle, so that the exhaust gas and the water mist form convection, and the water mist removes dust and purifies the exhaust gas. After that, the exhaust gas flows back to the cabinet 1 through the fan 15, thereby improving the convenience of exhaust gas purification and circulation.

[0032] The utility model provides a fume hood exhaust gas circulation filtering device, which, when working, sucks air into the first cylinder 4 through the filtering device, so that the first cylinder 4 sucks air into the cabinet 1 through the cover 3, so that the exhaust gas in the cabinet 1 enters the first cylinder 4, and the large particles of dirt in the exhaust gas are filtered and processed through the first filter 5, and then the filtered exhaust gas is transported to the filtering device for secondary filtration, and the purified exhaust gas flows back to the cabinet 1, so that the exhaust gas is circulated and transported in the cabinet 1, and the cleaning device is turned on to clean and discharge the dirt on the first filter 5.

[0033] The motor 10, dust collector 11, fan 15 and water pump 17 of the exhaust gas circulation filtering device of a fume hood of the present invention are purchased on the market. Technicians in this industry only need to install and operate them according to the accompanying instruction manual, without the need for technical personnel in this field to make creative efforts.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A fume hood exhaust gas circulation filter device, comprising a cabinet body (1) and a mesh plate (2), wherein the mesh plate (2) is mounted on the inner side wall of the cabinet body (1); characterized in that: The invention also includes a filtering device, a cleaning device, a cover (3), a first cylinder (4) and a first filter (5); the cover (3) is mounted on the inner wall of the cabinet (1); the top of the cover (3) is in communication with the screen (2); the first cylinder (4) is mounted on the lower inner wall of the cabinet (1); the top of the first cylinder (4) is in communication with the bottom of the cover (3); the first filter (5) is mounted on the inner wall of the first cylinder (4); the lower part of the first cylinder (4) is in communication with the filtering device; the filtering device is used to inhale air from the first cylinder (4); and the filtering device is used to return the purified waste gas to the cabinet (1); the cleaning device is arranged in the first cylinder (4); and the cleaning device is used to clean the first filter (5).

2. The fume hood exhaust gas circulation filter device according to claim 1, characterized in that: The cleaning device comprises a bracket (6), a conveying box (7), a connecting pipe (8), an air suction box (9), a motor (10) and a dust collector (11), wherein the bracket (6) is mounted on the inner side wall of the first cylinder (4), the conveying box (7) is mounted on the top of the bracket (6), the upper part of the connecting pipe (8) is rotatably mounted on the inside of the conveying box (7), and the upper part of the connecting pipe (8) is communicated with the inside of the conveying box (7), the air suction box (9) is connected and arranged at the lower part of the outer side wall of the connecting pipe (8), the bottom end of the air suction box (9) is provided with an air suction groove, the bottom end of the air suction box (9) is close to the top surface of the first filter (5), the motor (10) is mounted on the top of the conveying box (7), the output end of the motor (10) is connected to the top end of the connecting pipe (8), and the input end of the dust collector (11) is communicated with the inside of the conveying box (7).

3. The exhaust gas circulation filter device for a fume hood according to claim 1, characterized in that: The filtering device comprises a second cylinder (12), a delivery pipe (13), a third cylinder (14), a fan (15), a plurality of annular pipes (16) and a water pump (17). Purified water is provided in the lower part of the second cylinder (12). The input end of the delivery pipe (13) is communicated with the first cylinder (4), and the output end of the delivery pipe (13) is communicated with the second cylinder (12). The third cylinder (14) is arranged on the upper part of the second cylinder (12). The input end of the fan (15) is communicated with the third cylinder (14), and the output end of the fan (15) is communicated with the cabinet (1). The plurality of annular pipes (16) are all installed on the inner side wall of the third cylinder (14). The outer side walls of the plurality of annular pipes (16) are provided with nozzles, which are communicated with the inside of the third cylinder (14). The input end of the water pump (17) is communicated with the second cylinder (12), and the output end of the water pump (17) is communicated with the plurality of annular pipes (16) through pipelines.

4. A fume hood exhaust gas circulation filter device as claimed in claim 3, characterized in that: It also includes a filter box (18) and a second filter screen (19). The input end of the filter box (18) is communicated with the second cylinder (12). The second filter screen (19) is installed on the inner wall of the filter box (18). The input end of the water pump (17) is communicated with the filter box (18).

5. The fume hood exhaust gas circulation filter device according to claim 3, characterized in that: It also includes an activated carbon layer (20), which is arranged inside the third cylinder (14).

6. The fume hood exhaust gas circulation filter device according to claim 1, characterized in that: It also includes a grille (21), which is installed on the inner wall of the cabinet (1) and is arranged above the mesh plate (2).

7. The fume hood exhaust gas circulation filter device according to claim 1, characterized in that: An air detector is provided in the cabinet (1).

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