Intelligent energy-saving exhaust system for laboratory

Abstract

The utility model discloses an intelligent energy-saving exhaust system for a laboratory, which comprises a plurality of ventilation cabinets for ventilating the laboratory, an exhaust main pipe, a control system, a waste gas treatment device and an exhaust fan, an exhaust branch pipe is arranged at an exhaust outlet of each ventilation cabinet, and the exhaust main pipe is arranged at the top of the laboratory in a hoisting manner and is communicated with the exhaust branch pipe; an exhaust branch valve is arranged between the exhaust branch pipe and the exhaust outlet, and a first sensor used for detecting gas in the ventilation cabinet is arranged on one side of the exhaust branch pipe; a waste gas treatment pipe is further arranged between the waste gas treatment device and the exhaust main pipe, the waste gas treatment device and the exhaust fan are sequentially arranged on the waste gas treatment pipe, and a first coarse filter is further arranged on the side, close to an air inlet of the waste gas treatment device, of the waste gas treatment pipe. The utility model belongs to the technical field of laboratory exhaust, and particularly provides an intelligent energy-saving exhaust system for a laboratory, which is used for realizing automatic exhaust work of a single ventilation cabinet and effectively filtering toxic and harmful gases.

Description

Technical Field

[0001] This utility model belongs to the field of laboratory ventilation technology, specifically referring to a laboratory intelligent energy-saving ventilation system. Background Technology

[0002] Biosafety cabinets are commonly used equipment in laboratories, widely applied in various biological laboratories to provide a sterile, dust-free, and safe working environment for cell culture in medical, pharmaceutical, and scientific research fields. The laboratory's exhaust system connects to multiple fume hoods via ductwork, maintaining negative pressure within the fume hoods during experiments and expelling waste and toxic gases from the fume hoods outdoors.

[0003] Current technologies cannot control exhaust volume based on the concentration of exhaust and toxic gases in a single fume hood, which can easily lead to the inability to quickly remove exhaust and toxic gases, thus contaminating the laboratory and compromising the safety of laboratory personnel. Furthermore, the filtration effect on gases containing particulate matter is poor, resulting in the release of toxic and harmful substances into the atmosphere. Utility Model Content

[0004] In view of the above situation and to overcome the shortcomings of the existing technology, this utility model provides a laboratory intelligent energy-saving exhaust system to solve how a single fume hood can achieve automatic exhaust and effectively filter toxic and harmful gases.

[0005] The technical solution adopted in this application is as follows:

[0006] This solution provides a smart and energy-saving exhaust system for laboratories, including multiple fume hoods for laboratory ventilation, exhaust main pipes, a control system, a waste gas treatment device, and an exhaust fan. The exhaust outlets of the fume hoods are equipped with exhaust branch pipes, and the exhaust main pipes are suspended from the top of the laboratory and connected to the exhaust branch pipes.

[0007] An exhaust branch valve is provided between the exhaust branch pipe and the exhaust outlet, and a first sensor for detecting the gas inside the fume hood is provided on one side of the exhaust branch pipe.

[0008] An exhaust gas treatment pipe is also provided between the exhaust gas treatment device and the main exhaust pipe. The exhaust gas treatment device and the exhaust fan are sequentially arranged on the exhaust gas treatment pipe. A first coarse filter is also provided on the side of the exhaust gas treatment pipe near the air inlet of the exhaust gas treatment device.

[0009] Preferably, the waste gas treatment device includes a treatment box and a fixed frame located on the inner wall of the treatment box. A filter screen is installed on the fixed frame, and several sets of filter screens are arranged parallel to each other inside the treatment box. Vertically distributed baffles are provided between the filter screens, and the filter screens and baffles are arranged in a continuous S-shape. At least four sets of filter screens are provided inside the treatment box, and each layer of filter screen includes 5-6 filter discs, with 5mm thick filter cotton filling the spaces between adjacent filter discs.

[0010] Preferably, a second sensor is provided between the waste gas treatment pipe and the exhaust fan.

[0011] Preferably, a second coarse filter is provided between the main exhaust pipe and the branch exhaust pipe.

[0012] Preferably, the exhaust main pipe is equipped with a fire damper, which is a normally open fire damper.

[0013] Preferably, the exhaust main pipe is equipped with a static pressure box.

[0014] Preferably, the control system includes a PLC controller and an operation panel. The input terminal of the PLC controller is connected to the start signal terminal of the on / off switch on the operation panel. The output terminal of the PLC controller is connected to a first sensor, a second sensor, an exhaust valve, and an exhaust fan. The control system can automatically adjust the opening of the exhaust valve by detecting the gas concentration, automatically adjust the speed and air volume of the exhaust fan by detecting the gas concentration, and can also be controlled using the operation panel.

[0015] Preferably, the control system further includes a communicator connected to the PLC controller and a smart terminal. The smart terminal includes a mobile app or smart device, which enables remote control functionality, facilitating researchers to prepare the experimental environment in advance and allowing managers to view and control the operation status of the ventilation system at any time.

[0016] Preferably, the first and second sensors are toxic gas sensors, including but not limited to carbon monoxide sensors and nitrogen oxide sensors.

[0017] The beneficial effects of this utility model by adopting the above structure are as follows:

[0018] 1. The opening of the exhaust valve is automatically adjusted by the detection of the first sensor, thereby controlling the exhaust operation of a single exhaust cabinet. The speed and air volume of the exhaust fan are automatically adjusted by the detection of the second sensor, which is environmentally friendly and energy-saving.

[0019] 2. By using the first and second coarse filters, pre-purification is carried out before the exhaust gas treatment work, reducing the workload of subsequent work. With the exhaust gas treatment device, particulate matter is impacted and adhered to the filter cotton and filter sheet by the airflow, thus achieving effective treatment of toxic and harmful gases. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of a laboratory intelligent energy-saving exhaust system provided for this solution;

[0021] Figure 2 This is a partially enlarged schematic diagram of the waste gas treatment device in this scheme;

[0022] Figure 3 The schematic diagram provided for this application.

[0023] The meanings of the labels in the attached diagram are as follows:

[0024] 1. Laboratory, 2. Fume hood, 3. Main exhaust pipe, 4. Control system, 5. Waste gas treatment device, 6. Exhaust fan, 7. Exhaust branch pipe, 8. First coarse filter, 9. Second coarse filter;

[0025] 31. Fire damper; 32. Static pressure box;

[0026] 41. PLC controller; 42. Operation panel; 43. Communicator;

[0027] 71. Exhaust valve; 72. First sensor;

[0028] 51. Exhaust gas treatment pipe; 52. Treatment box; 53. Filter screen; 54. Baffle plate;

[0029] 61. Second sensor; 62. Insect-proof filter; 63. Rain cap. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] Example 1

[0032] Please refer to Figure 1 As shown, this embodiment provides a smart energy-saving ventilation system for a laboratory, including multiple fume hoods 2 for ventilation of laboratory 1, exhaust main pipe 3, control system 4, waste gas treatment device 5 and exhaust fan 6. The exhaust outlet of the fume hood 2 is provided with an exhaust branch pipe 7. The exhaust main pipe 3 is suspended on the top of laboratory 1 and connected to the exhaust branch pipe 7.

[0033] In this embodiment, an exhaust branch valve 71 is provided between the exhaust branch pipe 7 and the exhaust port, and a first sensor 72 for detecting the gas in the fume hood 2 is provided on one side of the exhaust branch pipe 7; an exhaust gas treatment pipe 51 is also provided between the exhaust gas treatment device 5 and the exhaust main pipe 3, and the exhaust gas treatment device 5 and the exhaust fan 6 are sequentially arranged on the exhaust gas treatment pipe 51, and a second sensor 61 is provided between the exhaust gas treatment pipe 51 and the exhaust fan 6.

[0034] refer to Figure 3 As shown, the control system 4 includes a PLC controller 41 and an operation panel 42. The input terminal of the PLC controller 41 is connected to the start signal terminal of the on / off switch on the operation panel 42, and control is achieved through the operation panel 42. The output terminal of the PLC controller 41 is connected to the first sensor 72, the second sensor 61, the exhaust valve 71, and the exhaust fan 6. The first sensor 72 and the second sensor 61 are toxic gas sensors, including but not limited to carbon monoxide sensors and nitrogen oxide sensors.

[0035] When using this structure, when the concentration reaches a dangerous level, the exhaust fan 6 is automatically turned on for forced ventilation. The first sensor 72 detects the gas concentration and automatically adjusts the opening of the exhaust valve 71. The second sensor 61 detects the gas concentration and adjusts the speed and air volume of the exhaust fan 6. The first sensor 72 controls the ventilation of a single exhaust cabinet, and the second sensor 61 automatically adjusts the speed and air volume of the exhaust fan 6, which is environmentally friendly and energy-saving.

[0036] like Figure 1 and Figure 2 As shown, the exhaust gas treatment device 5 includes a treatment box 52 and a fixed frame located on the inner wall of the treatment box 52. A filter screen 53 is installed on the fixed frame. Several groups of filter screens 53 are arranged parallel to each other inside the treatment box 52. Vertically distributed baffles 54 are provided between the filter screens 53. The filter screens 53 and the baffles 54 are arranged in a continuous S-shape.

[0037] The processing box 52 is equipped with at least four sets of filter screens 53. Each layer of filter screen 53 includes 5-6 filter discs, and the space between adjacent filter discs is filled with filter cotton with a thickness of 5mm.

[0038] Preferably, the exhaust gas treatment pipe 51 is further provided with a first coarse filter 8 on the side near the air inlet of the exhaust gas treatment device 5, and a second coarse filter 9 is provided between the exhaust main pipe 3 and the exhaust branch pipe 7.

[0039] When using this structure, the first coarse filter 8 and the second coarse filter 9 are used to pre-purify the exhaust gas before the exhaust gas treatment work is carried out, reducing the workload of subsequent work. With the exhaust gas treatment device 5, particulate matter is impacted and adhered to the filter cotton and filter sheet by the airflow, so as to achieve effective treatment of toxic and harmful gases.

[0040] As one example:

[0041] The exhaust duct 3 is equipped with a fire damper 31, which is a normally open fire damper 31. The fuse of the fire damper 31 has an operating temperature of 70°C. When the airflow temperature of the exhaust duct 3 reaches 70°C, the fusible link of the fire damper 31 automatically melts and the valve of the fire damper 31 automatically closes under the action of the torsion spring.

[0042] As one example:

[0043] The exhaust main pipe 3 is equipped with a static pressure box 32, which is used to reduce dynamic pressure, increase static pressure, stabilize airflow, reduce airflow noise and vibration, and evenly distribute air volume. The static pressure box 32 is located between the second coarse filter 9 and the fire damper 31. The second coarse filter 9 is located on the side close to the exhaust branch pipe 7.

[0044] As one example:

[0045] The control system 4 also includes a communicator 43, which is connected to the PLC controller 41 and communicates with a smart terminal. The smart terminal includes a mobile APP or a smart device, which enables remote control functions, allowing experimental personnel to prepare the experimental environment in advance and allowing management personnel to view and control the operation status of the ventilation system at any time.

[0046] As one example:

[0047] The toxic gas sensors include, but are not limited to, carbon monoxide sensors and nitrogen oxide sensors. Specifically, the nitrogen oxide sensor is a 5WK966141 nitrogen oxide gas sensor. The carbon monoxide sensor is an electrochemical carbon monoxide module ZE07-CO carbon monoxide gas sensor.

[0048] As one example:

[0049] The laboratory 1 is also equipped with display and alarm devices connected to the control system 4, which are used to display the data detected by the sensors and to trigger alarms based on the concentration of toxic gases detected.

[0050] As one example:

[0051] The exhaust fan 6 has a stainless steel insect-proof filter 62 installed in the air outlet, and a rain cap 63 is provided at the end of the air outlet.

[0052] It should be noted that although embodiments of the present invention have been shown and described, those skilled in the art who design similar structures and embodiments without departing from the spirit of the present invention should all fall within the protection scope of the present invention.

Claims

1. A laboratory intelligent energy-saving exhaust system, comprising a plurality of fume hoods (2) for ventilation of a laboratory (1), an exhaust main pipe (3), a control system (4), an exhaust gas treatment device (5) and an exhaust fan (6), wherein an exhaust branch pipe (7) is arranged at an exhaust port of the fume hood (2), the exhaust main pipe (3) is hung on the top of the laboratory (1) and is connected with the exhaust branch pipe (7), and characterized in that: an exhaust distribution valve (71) is arranged between the exhaust branch pipe (7) and the exhaust port, and a first sensor (72) for detecting gas in the fume hood (2) is arranged on one side of the exhaust branch pipe (7); an exhaust treatment pipe (51) is further arranged between the exhaust gas treatment device (5) and the exhaust main pipe (3), the exhaust gas treatment device (5) and the exhaust fan (6) are sequentially arranged on the exhaust treatment pipe (51), and a first coarse filter (8) is further arranged on the side of the exhaust treatment pipe (51) close to the air inlet of the exhaust gas treatment device (5). The exhaust gas treatment device (5) comprises a treatment box (52) and a fixed frame on the inner wall of the treatment box (52), a filter screen (53) is arranged on the fixed frame, a plurality of groups of the filter screen (53) are arranged in parallel in the treatment box (52), a flow baffle (54) is arranged between the filter screens (53) and is distributed vertically, and the filter screen (53) and the flow baffle (54) are arranged in a continuous S shape. A second sensor (61) is arranged between the exhaust treatment pipe (51) and the exhaust fan (6).

2. The laboratory intelligent energy-saving exhaust system according to claim 1, characterized in that: A second coarse filter (9) is arranged between the exhaust main pipe (3) and the exhaust branch pipe (7).

3. The laboratory intelligent energy-saving exhaust system according to claim 1, wherein: A fireproof valve (31) is arranged on the exhaust main pipe (3), and the fireproof valve (31) is a normally open fireproof valve.

4. The laboratory intelligent energy-saving exhaust system according to claim 1, characterized in that: A static pressure box (32) is arranged on the exhaust main pipe (3).

5. The intelligent energy saving exhaust system for laboratory according to claim 1, wherein: The control system (4) comprises a PLC controller (41) and an operation panel (42), the input end of the PLC controller (41) is connected with the starting signal end of the start-stop switch on the operation panel (42), the output end of the PLC controller (41) is connected with the first sensor (72), the second sensor (61), the exhaust distribution valve (71) and the exhaust fan (6), the opening degree of the exhaust distribution valve (71) is automatically adjusted by detecting the gas concentration, and the rotating speed and air volume of the exhaust fan (6) are automatically adjusted by detecting the gas concentration.

6. The intelligent energy saving exhaust system for laboratory according to claim 5, wherein: The control system (4) further comprises a communicator (43), the communicator (43) is connected with the PLC controller (41), and the communicator (43) is in communication connection with an intelligent terminal.

7. The intelligent energy saving exhaust system for laboratory according to claim 3, wherein: The first sensor (72) and the second sensor (61) are toxic gas sensors, and the toxic gas sensors comprise carbon monoxide sensors and nitrogen oxide sensors.

8. The intelligent energy saving exhaust system for laboratory according to claim 7, characterized in that: ​ 9. The intelligent energy saving exhaust system for laboratory according to claim 7, wherein: ​

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