Intelligent laboratory ventilation regulating device

Abstract

The utility model relates to laboratory safety equipment technical field especially, more particularly to a kind of intelligent laboratory ventilation control device, including experiment cabinet and first telescopic pipe etc., controller is installed in experiment cabinet side edge, the front side of experiment cabinet is slidably connected with baffle, exhaust gas concentration detector is installed in the bottom of moving plate, exhaust fan is installed in moving plate, exhaust pipe is connected in the top of experiment cabinet, connecting pipe is connected in the top of exhaust pipe, connecting pipe is communicated with external exhaust gas treatment equipment, first telescopic pipe lower end is sealingly connected with the outer ring of the top of exhaust fan, first telescopic pipe upper end is sealingly connected with the inner ring of exhaust pipe, the front end of moving plate is provided with the isolation component for isolating exhaust gas. Through the real-time linkage of exhaust fan and exhaust gas concentration detector, according to gas concentration adjustment exhaust fan speed, while electric slide rail drives moving plate to move down and reduce exhaust gas capture distance, so that exhaust volume is always matched with exhaust gas production, reach the purpose of self-regulating air volume, while reducing invalid exhaust energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of laboratory safety equipment technology, and in particular to an intelligent laboratory ventilation control device. Background Technology

[0002] Modern chemical, biological, and materials science laboratories often involve operations involving volatile solvents, toxic gases, or reaction byproducts. Examples include the use of volatile solvents like toluene and acetone in organic synthesis, the release of nitrogen oxides during strong acid digestion, and the generation of toxic aerosols from high-temperature reactions. These experiments continuously generate complex waste gases with dynamically changing concentrations within enclosed spaces. If these gases escape into the experimental environment, they will directly endanger the health of operators and contaminate equipment.

[0003] Currently, laboratories commonly use fume hoods as core protective equipment. These hoods create a negative pressure environment using top fans, placing experimental equipment within a closed or semi-closed enclosure. Directional airflow rapidly extracts waste gases generated in the operating area through ducts, purifying them before discharge. This system relies on manually preset airflow or simple on / off control, and theoretically can block over 90% of harmful substances from spreading.

[0004] However, traditional fume hoods have significant operational drawbacks: power adjustment lag, as the rate of exhaust gas generation during experiments often fluctuates drastically due to changes in the reaction stage, but a fixed fan speed mode cannot match the demand in real time. Insufficient airflow leads to exhaust gas stagnation, while excessive airflow results in energy waste; operational safety is contradictory, as experimenters must continuously monitor the reaction status, and are forced to adjust the dampers or fan power when there is a sudden surge in exhaust gas volume. This process interrupts critical experimental operations and creates a hazardous gas leakage window due to the delayed response; the risk of runaway is exacerbated, as manual adjustment is far slower than the exhaust gas burst rate when the reaction unexpectedly goes out of control, and existing equipment lacks an active emergency control mechanism, greatly increasing the risk of exposure. Utility Model Content

[0005] To overcome the shortcomings of lacking dynamic control, this utility model provides an intelligent laboratory ventilation control device, which aims to solve the above-mentioned shortcomings.

[0006] An intelligent laboratory ventilation control device includes an experimental cabinet and a first telescopic pipe. A controller is installed on the side of the experimental cabinet. A baffle is slidably connected to the front of the experimental cabinet. Electric slide rails are installed on both the left and right sides inside the experimental cabinet. A movable plate is slidably connected inside the experimental cabinet. The electric slide rails jointly drive the movable plate. An exhaust gas concentration detector is installed at the bottom of the movable plate and is wired to the controller. An exhaust fan is installed inside the movable plate and is wired to the controller. An exhaust duct is connected to the top of the experimental cabinet. A connecting pipe is connected to the top of the exhaust duct and communicates with external exhaust gas treatment equipment. The lower end of the first telescopic pipe is sealed to the outer ring of the top of the exhaust fan, and the upper end of the first telescopic pipe is sealed to the inner ring of the exhaust duct. An isolation component for isolating exhaust gas is provided at the front end of the movable plate.

[0007] Furthermore, the isolation component includes an air supply duct, a blower is installed on the top of the experimental cabinet, the blower is wired to the controller, a diversion pipe is connected to the front end of the moving plate, one end of the air supply duct is connected to the air outlet of the blower, and the other end branches and connects to all the diversion pipes, the middle part of the air supply duct is set as a retractable second telescopic pipe, the bottom end of the diversion pipe passes through the moving plate and is connected to the air outlet pipe, and the cross-section of the air outlet pipe is an inverted triangle with an open bottom.

[0008] Furthermore, a stabilizing frame is connected to the rear side of the baffle, and the air supply pipe is slidably connected within the stabilizing frame.

[0009] Furthermore, a guide plate is connected to the bottom of the movable plate, and the inclined plates around the guide plate all converge towards the center, with the exhaust fan located in the middle of the guide plate.

[0010] Furthermore, a display is installed on the controller, and the display is wired to the controller.

[0011] Furthermore, the air inlet of the blower is connected to a filter screen.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. By linking the exhaust fan with the exhaust gas concentration detector in real time, the exhaust fan speed is adjusted according to the gas concentration. At the same time, the electric slide rail drives the moving plate to move down to reduce the exhaust gas capture distance, so that the exhaust volume always matches the exhaust gas generation, achieving the purpose of autonomously adjusting the air volume and reducing ineffective exhaust energy consumption.

[0014] 2. Air is supplied to the air supply pipe, the diversion pipe and the exhaust pipe by the blower. The exhaust pipe with the inverted triangle design uses the Venturi effect to accelerate the airflow and form an air curtain barrier at the front edge of the operating table, which improves the gas barrier efficiency and ensures the absorption of exhaust gas. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the installation structure of the first telescopic pipe and the air duct of this utility model.

[0017] Figure 3 This is a schematic diagram of the installation structure of the exhaust fan and movable plate of this utility model.

[0018] Figure 4 This is a schematic diagram of the installation structure of the exhaust gas concentration detector and the guide plate of this utility model.

[0019] Figure 5 This is a sectional view of the installation structure of the blower and air supply pipe of this utility model.

[0020] Component names and serial numbers in the diagram: 1_Experiment cabinet, 101_Controller, 102_Baffle, 2_Moving plate, 201_Exhaust gas concentration detector, 3_Electric slide rail, 4_Exhaust fan, 5_First telescopic pipe, 6_Exhaust duct, 7_Connecting pipe, 8_Blower, 9_Air supply duct, 10_Second telescopic pipe, 11_Diverter pipe, 12_Outlet pipe, 13_Stabilizer, 14_Guide plate, 15_Display, 16_Filter. Detailed Implementation

[0021] The preferred technical solution of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Example: An intelligent laboratory ventilation control device, such as Figures 1-5As shown, the system includes an experimental cabinet 1, a controller 101, a baffle 102, a movable plate 2, an exhaust gas concentration detector 201, an electric slide rail 3, an exhaust fan 4, a first telescopic pipe 5, an exhaust duct 6, a connecting pipe 7, and an isolation assembly. The controller 101 is installed on the side of the experimental cabinet 1. The baffle 102 is slidably connected to the front of the experimental cabinet 1. Electric slide rails 3 are installed on both the left and right sides inside the experimental cabinet 1. The movable plate 2 is slidably connected inside the experimental cabinet 1, and the electric slide rails 3 jointly drive the movable plate 2. The exhaust gas concentration detector 201 is installed at the bottom of the movable plate 2 and is wiredly connected to the controller 101. The experimental cabinet 1 forms a sealed operating space. The controller 101 receives signals from sensors such as the exhaust gas concentration detector 201. The signal coordinates the operation of the subsystem. The baffle 102 adopts an electric lifting design to form an adjustable exhaust gas capture zone. An exhaust fan 4 is installed inside the movable plate 2. The exhaust fan 4 is wired to the controller 101. An exhaust pipe 6 is connected to the top of the experimental cabinet 1. The exhaust fan 4 adopts a brushless DC motor, and the speed is precisely adjusted by a PWM signal. A connecting pipe 7 is connected to the top of the exhaust pipe 6. The connecting pipe 7 is connected to the external exhaust gas treatment equipment. The lower end of the first telescopic pipe 5 is sealed to the outer ring of the top of the exhaust fan 4. The upper end of the first telescopic pipe 5 is sealed to the inner ring of the exhaust pipe 6. The connecting pipe 7 is connected to the external treatment system by a flange and a check valve is set to prevent backflow of air. An isolation component for isolating exhaust gas is set at the front end of the movable plate 2.

[0023] like Figure 1 , Figure 2 and Figure 5 As shown, the isolation assembly includes a blower 8, an air supply pipe 9, a second telescopic pipe 10, a diversion pipe 11, and an exhaust pipe 12. The blower 8 is installed on the top of the experimental cabinet 1. The blower 8 is wired to the controller 101. The front end of the moving plate 2 is connected to the diversion pipe 11. One end of the air supply pipe 9 is connected to the exhaust end of the blower 8, and the other end branches and connects to all the diversion pipes 11. The middle part of the air supply pipe 9 is set as a telescopic second telescopic pipe 10. The bottom end of the diversion pipe 11 passes through the moving plate 2 and is connected to the exhaust pipe 12. The cross-section of the exhaust pipe 12 is an inverted triangle with an open bottom. The airflow is delivered to the diversion pipe 11 through the air supply pipe 9 and finally ejected at high speed from the inverted triangular nozzle of the exhaust pipe 12, forming a uniform vertical air curtain at the front edge of the moving plate 2. This effectively blocks the gas from overflowing and does not interfere with the experimental operation on the table.

[0024] like Figure 5 As shown, it also includes a stabilizer 13, with the stabilizer 13 connected to the rear side of the baffle 102, and the air supply duct 9 slidably connected inside the stabilizer 13.

[0025] like Figure 4 As shown, it also includes a guide plate 14. The bottom of the movable plate 2 is connected to the guide plate 14. The inclined plates around the guide plate 14 all converge towards the center. The exhaust fan 4 is located in the middle of the guide plate 14. The guide plate 14 can improve the exhaust gas capture efficiency and reduce energy consumption.

[0026] like Figure 1 As shown, it also includes a display 15. The controller 101 is equipped with a display 15, which is wired to the controller 101. The display 15 displays the exhaust gas concentration separately and uses different colors to show the concentration level, so that other experimenters can understand the progress of the experiment and assist in the operation.

[0027] like Figure 2 As shown, it also includes a filter screen 16, which is connected to the air inlet of the blower 8.

[0028] When the experimenter needs to conduct an experiment, the controller 101 opens the experimental cabinet 1, driving the baffle 102 to slide upward. The experimenter places the experimental materials and tools to be used on the operating table of the experimental cabinet 1. The exhaust system at the rear of the operating table is turned on, and the exhaust fan 4 blows the air in the experimental cabinet 1 upward. After passing through the first telescopic pipe 5 and the exhaust pipe 6, the air is discharged from the connecting pipe 7, so that the exhaust gas generated by the operating table can be discharged in time. The exhaust gas concentration detector 201 monitors the exhaust gas concentration in real time. After the controller 101 obtains the exhaust gas concentration value, it sends it to the display 15. The display 15 magnifies and displays the result detected by the exhaust gas concentration detector 201. The blower 8 pumps the air into the air supply pipe 9, which is then split through the diversion pipe 11 and discharged from the exhaust pipe 12. The exhaust pipe 12 is wider at the top and narrower at the bottom, so that the airflow is further accelerated and forms a wind wall at the front end of the moving plate 2 to isolate the exhaust gas generated by the experiment.

[0029] During the experiment, the exhaust gas moves along the direction of airflow. When the exhaust gas flows through the exhaust gas concentration detector 201, its concentration is monitored in real time. It is then guided out by the exhaust fan 4, accelerated by the exhaust fan 4, and enters the first telescopic pipe 5. It is then discharged from the connecting pipe 7 along the exhaust pipe 6 and is purified through subsequent treatment. The controller 101 adjusts the power of the exhaust fan 4 and the distance between the moving plate 2 and the operating table according to the concentration detected by the exhaust gas concentration detector 201. The controller 101 is set with different ventilation levels. When the exhaust gas concentration increases, the controller 101 increases the operating power of the exhaust fan 4 and increases the air extraction rate. At the same time, the electric slide rail 3 is activated to drive the moving plate 2 to move downward, so that the moving plate 2 and the exhaust fan 4 are closer to the operating table, reducing the time when the gas is suspended. The first telescopic pipe 5 and the second telescopic pipe 10 are extended accordingly to ensure stable gas delivery. As the exhaust gas concentration increases, the speed of the exhaust fan 4 increases, and the moving plate 2 gets closer and closer to the operating table. The exhaust gas escape is controlled in time. The experimenter does not need to adjust the ventilation efficiency during the experiment and can concentrate on the experiment.

[0030] After the experiment is completed, the experimenter closes the experimental cabinet 1 using the controller 101. The blower 8 stops running, and the filter 16 filters the incoming air to ensure the service life of the blower 8. The electric slide rail 3 drives the moving plate 2 to slide upward and reset. The first telescopic tube 5 and the second telescopic tube 10 retract accordingly. The exhaust fan 4 and the exhaust gas concentration detector 201 are turned off, and the display 15 goes out. After cleaning the operating table, the experimenter controls the baffle 102 to move down using the controller 101 to completely close the experimental cabinet 1.

[0031] When the baffle 102 moves, the stabilizer 13 slides along the air supply pipe 9 to reduce the lateral vibration of the air supply pipe 9.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An intelligent laboratory ventilation control device, characterized in that, The experimental cabinet includes an experimental cabinet (1) and a first telescopic tube (5). A controller (101) is installed on the side of the experimental cabinet (1). A baffle (102) is slidably connected to the front of the experimental cabinet (1). Electric slide rails (3) are installed on both the left and right sides inside the experimental cabinet (1). A movable plate (2) is slidably connected inside the experimental cabinet (1). The electric slide rails (3) drive the movable plate (2). A waste gas concentration detector (201) is installed at the bottom of the movable plate (2). The waste gas concentration detector (201) is wiredly connected to the controller (101). The movable plate (2) is equipped with an exhaust fan (4), which is wired to the controller (101). The top of the experimental cabinet (1) is connected to an exhaust pipe (6), and the top of the exhaust pipe (6) is connected to a connecting pipe (7). The connecting pipe (7) is connected to an external waste gas treatment device. The lower end of the first telescopic pipe (5) is sealed to the outer ring of the top of the exhaust fan (4), and the upper end of the first telescopic pipe (5) is sealed to the inner ring of the exhaust pipe (6). The front end of the movable plate (2) is provided with an isolation component for isolating waste gas.

2. The intelligent laboratory ventilation control device according to claim 1, characterized in that, The isolation assembly includes an air supply duct (9), a blower (8) is installed on the top of the experimental cabinet (1), the blower (8) is wired to the controller (101), a diversion pipe (11) is connected to the front end of the moving plate (2), one end of the air supply duct (9) is connected to the air outlet of the blower (8), and the other end is forked and connected to all the diversion pipes (11). The middle part of the air supply duct (9) is set as a retractable second telescopic pipe (10). The bottom end of the diversion pipe (11) passes through the moving plate (2) and is connected to the air outlet pipe (12). The cross-section of the air outlet pipe (12) is an inverted triangle with an open bottom.

3. The intelligent laboratory ventilation control device according to claim 2, characterized in that, A stabilizing frame (13) is connected to the rear side of the baffle (102), and the air supply pipe (9) is slidably connected to the stabilizing frame (13).

4. The intelligent laboratory ventilation control device according to claim 3, characterized in that, The bottom of the movable plate (2) is connected to a guide plate (14), and the inclined plates around the guide plate (14) all converge toward the center. The exhaust fan (4) is located in the middle of the guide plate (14).

5. The intelligent laboratory ventilation control device according to claim 4, characterized in that, The controller (101) is equipped with a display (15), which is wired to the controller (101).

6. The intelligent laboratory ventilation control device according to claim 5, characterized in that, The air inlet of the blower (8) is connected to a filter screen (16).

Images