Intelligent exhaust system for laboratory

Abstract

The invention discloses a laboratory intelligent exhaust system which comprises a cabinet body, an exhaust module, an exhaust pipeline and an auxiliary airflow module, an adjusting door is arranged on the cabinet body, a working table is arranged in the cabinet body, an experimenter can conduct an experiment on the working table by opening the adjusting door, the cabinet body is provided with a first air outlet communicated with the exhaust pipeline, and the first air outlet is communicated with the auxiliary airflow module. The exhaust pipeline is connected with the exhaust module, and the tail end of the exhaust pipeline is located in the safe area. The air exhaust module generates air flow which flows into the cabinet body from the outside of the cabinet body and then flows into the air exhaust pipeline from the inside of the cabinet body, when the opening degree of the adjusting door is increased, the air flow generated by the air exhaust module in unit time is increased, and when the opening degree of the adjusting door reaches a preset safety degree threshold value, the cabinet body exhausts air outwards so as to keep a negative pressure state in the cabinet body; harmful gas in the cabinet body is prevented from diffusing in a laboratory, when the opening degree of the adjusting door is reduced, the gas flow generated by the exhaust module in unit time is reduced, and energy conservation can be achieved.

Description

[0001] This application claims the priority of the Chinese patent application filed with the China Patent Office on July 11, 2023, with application number 202310847417.0 and invention name “A Laboratory Intelligent Exhaust System”, all contents of which are incorporated by reference in this application. Technical Field

[0002] The present application relates to the technical field of laboratory equipment, and more specifically, to an intelligent laboratory exhaust system. Background Art

[0003] When conducting experiments in the laboratory, various harmful gases are usually generated. In order to prevent the harmful gases from spreading in the laboratory, experiments that generate harmful gases are usually conducted in an exhaust system. Existing fume hoods usually include a cabinet body, and there is an adjustable door with an adjustable opening degree on the cabinet body. There is a work surface in the cabinet body. The experimenter conducts experiments on the work surface by opening the adjustable door. The exhaust module generates airflow, which puts the cabinet body in a negative pressure state, so that the gas in the cabinet body will not spread into the laboratory, and is discharged to a safe area through the exhaust duct with the airflow. Usually, the amount of airflow generated by the exhaust module per unit time is fixed, but because the opening degree of the adjustable door on the exhaust system can be adjusted, when the opening degree of the adjustable door increases, the amount of airflow generated by the exhaust module per unit time may not be able to put the cabinet body in a negative pressure state, and cannot prevent the harmful gases in the cabinet body from spreading in the laboratory. Summary of the invention

[0004] In view of this, the present application provides a laboratory intelligent exhaust system for solving the problem of existing laboratory exhaust systems that, when the opening degree of the adjustment door increases, the air flow rate generated by the exhaust module per unit time may not be able to make the cabinet body in a negative pressure state, and cannot prevent harmful gases in the cabinet body from spreading in the laboratory.

[0005] In order to achieve the above objectives, the proposed solution is as follows:

[0006] A laboratory intelligent exhaust system comprises: a cabinet, an exhaust module, an exhaust duct, and an auxiliary airflow module, wherein the cabinet is provided with an adjustable door, a work surface is provided in the cabinet, and an experimenter can conduct an experiment on the work surface by opening the adjustable door, the cabinet is provided with a first air outlet, the first air outlet is communicated with the exhaust duct, the exhaust duct is connected with the exhaust module, and the end of the exhaust duct is located in a safe area;

[0007] The exhaust module is used to generate an airflow from outside the cabinet to inside the cabinet, and then from inside the cabinet to the exhaust duct, so that the cabinet is in a negative pressure state, wherein when the opening degree of the adjustment door increases, the airflow generated by the exhaust module per unit time increases, and when the opening degree of the adjustment door decreases, the airflow generated by the exhaust module per unit time decreases;

[0008] The auxiliary airflow module is used to blow air into the cabinet when the opening degree of the adjustment door reaches a preset safety threshold, so as to maintain a negative pressure state in the cabinet.

[0009] Preferably, the auxiliary airflow module blows air into the cabinet by blowing air toward a preset second air outlet, wherein the second air outlet is arranged on a side panel in the cabinet close to the adjusting door, and / or the second air outlet is arranged on a side above the work surface close to the adjusting door.

[0010] Preferably, the auxiliary airflow module comprises: a bellows disposed outside the cabinet, and a first air pipe connected to the bellows, wherein the first air pipe is communicated with the second air outlet.

[0011] Preferably, it further comprises: a gas leakage detection device for detecting whether the gas in the cabinet leaks out of the cabinet.

[0012] Preferably, the gas leakage detection device includes: a smoke generator arranged in the cabinet, used to generate smoke in the cabinet, so that when the exhaust module generates airflow, the experimenter can judge whether the gas in the cabinet has leaked out of the cabinet according to whether the smoke generated in the cabinet overflows outside the adjustment door.

[0013] Preferably, the gas leakage detection device also includes a laser, and the adjusting door is slidably disposed in the door frame of the cabinet. When the experimenter is located in the cabinet to conduct an experiment, the adjusting door is in an open state to form an open area within the area enclosed by the door frame. The laser is arranged on a portion of the door frame corresponding to the open area, and the laser of the laser forms a light curtain, which fills the open area, and the light curtain visualizes the smoke flowing to the light curtain.

[0014] Preferably, the door frame is provided with a slideway cooperating with the adjusting door, the slideways are two slideways arranged opposite to each other, each slideway is provided with a groove, a laser is embedded in the groove, and the laser heads of the two lasers are opposite to each other.

[0015] Preferably, the gas leakage detection device comprises: a gas storage device arranged outside the cabinet, a gas releaser arranged inside the cabinet, and a gas detector arranged outside the cabinet;

[0016] The gas storage device is used to transmit the stored safety gas to the gas releaser through a second gas pipe embedded in the side panel of the cabinet;

[0017] The gas releaser is used to release the safety gas in the cabinet;

[0018] The gas detector is used to detect whether the safety gas appears in the gas outside the cabinet when the exhaust module generates airflow. If so, it indicates that the gas in the cabinet has leaked out of the cabinet; if not, it indicates that the gas in the cabinet has not leaked out of the cabinet.

[0019] Preferably, the exhaust module includes: a fan and an air valve arranged at the first air outlet, the air valve is connected to the fan through the exhaust duct, and when the air valve is opened, the fan draws air in the cabinet to generate an airflow that flows from outside the cabinet to inside the cabinet, and then from inside the cabinet to the exhaust duct.

[0020] Preferably, it also includes: a controller, which is used to control the opening of the air valve after the regulating door is opened, and when the opening degree of the regulating door increases, the opening degree of the air valve is increased to increase the air flow generated by the fan per unit time, and when the opening degree of the regulating door decreases, the opening degree of the air valve is reduced to reduce the air flow generated by the fan per unit time, and when the opening degree of the regulating door is a preset minimum opening degree, the air valve is controlled to open to the opening degree corresponding to the minimum opening degree, so that the air flow generated by the fan per unit time reaches the preset minimum air flow.

[0021] Preferably, it also includes: a fire extinguishing device arranged in the cabinet, which is used to extinguish the fire when a fire occurs in the cabinet.

[0022] Preferably, the fire extinguishing device comprises:

[0023] A fire sensor, used to detect whether a fire occurs in the cabinet;

[0024] The fire extinguisher is used to spray fire extinguishing agent when a fire occurs in the cabinet.

[0025] Preferably, the fire sensor is further used to send a fire extinguishing signal to the fire extinguisher when a fire is detected in the cabinet; and the fire extinguisher sprays a fire extinguishing agent when receiving the fire extinguishing signal.

[0026] Preferably, it also includes: a remote terminal;

[0027] The fire sensor is further configured to send a fire signal indicating that a fire has occurred in the cabinet to the controller when a fire has occurred in the cabinet;

[0028] The controller is also used to forward the fire signal to the remote terminal.

[0029] Preferably, the remote terminal is further configured to send a fire extinguishing signal to the fire extinguisher when receiving the fire signal, and the fire extinguisher sprays a fire extinguishing agent when receiving the fire extinguishing signal.

[0030] Preferably, it also includes: a fire extinguishing start button, when the fire extinguishing start button is activated, the fire extinguisher sprays the fire extinguishing agent.

[0031] Preferably, the fire sensor comprises: any one or more types of fire sensors among smoke sensors, temperature sensors and flame detectors.

[0032] Preferably, a plurality of windows are installed on the adjusting door, and each window can be opened and closed by the experimenter.

[0033] Preferably, the controller is further used to adjust the opening degree of the air valve according to the opening state of each window.

[0034] Preferably, a window sensor corresponding to each window is provided on the adjusting door;

[0035] A window sensor, for sending a window opening signal to the controller indicating that the window is open when sensing that the corresponding window is open, and for sending a window closing signal to the controller indicating that the window is closed when sensing that the corresponding window is closed;

[0036] The controller increases the opening degree of the air valve when receiving the window opening signal, and decreases the opening degree of the air valve when receiving the window closing signal.

[0037] Preferably, it also includes: an audible and visual alarm device;

[0038] The controller is further configured to send an alarm signal to the sound and light alarm device when it is determined that a set abnormal condition is met;

[0039] The sound and light alarm device is used to make a sound and light alarm when receiving the alarm signal.

[0040] Preferably, the set abnormal condition includes any one or more of the following:

[0041] The surface wind speed in the cabinet exceeds a preset surface wind speed threshold;

[0042] The air flow rate generated by the fan per unit time exceeds a preset air flow rate threshold;

[0043] The airflow rate of the interfering airflow outside the cabinet exceeds a preset first wind speed threshold;

[0044] The fan is operated at maximum power and the air valve is opened to the maximum extent;

[0045] A fire occurs in the cabinet;

[0046] The temperature inside the cabinet exceeds a preset temperature threshold;

[0047] The opening degree of the regulating door exceeds the safety degree threshold;

[0048] The placement of the experimental equipment on the work surface exceeds the set range;

[0049] The set materials need to be supplemented or replaced;

[0050] The actual usage time of the set module reaches the preset corresponding time threshold.

[0051] Preferably, a first visual recognition camera is arranged on the top of the cabinet. If the first visual recognition camera detects that the placement of experimental equipment on the work surface exceeds a set range, the controller makes a judgment that the set abnormal condition is met, thereby triggering the sound and light alarm device to sound and light alarm.

[0052] Preferably, it also includes a second visual recognition camera, which is used to identify the opening height of the adjusting door. When the second visual recognition camera identifies that the opening height of the adjusting door exceeds a preset safety height threshold, the controller makes a judgment that the set abnormal condition is met, thereby triggering the sound and light alarm device to sound and light alarm.

[0053] Preferably, it also includes a second visual recognition camera, which is used to identify the opening height of the adjusting door. When the second visual recognition camera identifies that the opening height of the adjusting door exceeds a preset safety height threshold, the controller controls the adjusting door to descend. When the second visual recognition camera identifies that the adjusting door has descended to within the preset safety height threshold, the controller controls the adjusting door to stop descending.

[0054] Preferably, the sound and light alarm device comprises: a sound generator and a display light;

[0055] The sound generator is used to emit an alarm sound when receiving the alarm signal;

[0056] The display light is used to display a set first color when the alarm signal is not received, and to display a set second color or a third color when the alarm signal is received, wherein when the face wind speed in the cabinet exceeds a preset face wind speed threshold, or the airflow generated by the fan per unit time exceeds a preset airflow threshold, or the wind speed of the interfering airflow outside the cabinet exceeds a preset first wind speed threshold, or the fan operates at maximum power and the opening degree of the air valve is maximum, or a fire occurs in the cabinet, the display light displays the second color, and when the temperature in the cabinet exceeds a preset temperature threshold, or the opening degree of the adjustment door exceeds the safety threshold, or the placement of the experimental equipment on the work surface exceeds a set range, or the set materials need to be supplemented or replaced, or the actual usage time of the set module reaches the preset corresponding time threshold, the display light displays the third color.

[0057] Preferably, a disturbance flow detector is arranged outside the cabinet and on the side where the adjustment door is located, and the disturbance flow detector is used to detect the wind speed of the disturbing airflow near the adjustment door;

[0058] When the spoiler detector detects that the wind speed of the interfering airflow near the adjusting door exceeds a preset second wind speed threshold, the controller controls the exhaust module to increase the exhaust volume. Thereafter, when the spoiler detector detects that the wind speed of the interfering airflow near the adjusting door is lower than the second wind speed threshold within a preset time, the controller controls the exhaust module to restore the initial exhaust volume.

[0059] Preferably, it also includes: a remote terminal;

[0060] The controller is also used to upload the abnormal situation to the remote terminal when it is determined that the set abnormal condition is met.

[0061] Preferably, a lighting lamp is provided in the cabinet;

[0062] The controller is also used to adjust the color temperature and stepless brightness of the lighting lamp according to the lighting mode selected by the experimenter.

[0063] Preferably, it also includes: a work surface control button;

[0064] The controller is also used to control the work surface to rise or fall when the work surface control button is activated.

[0065] Preferably, it also includes: any one or more of a human body sensor, a foot switch, a door adjustment button, and a door adjustment sensor;

[0066] The human body sensor is used to send an adjustment door opening signal to the controller for controlling the adjustment door to open to a preset first safety level when the experimenter is located in front of the cabinet;

[0067] The foot switch is used to send the regulating door opening signal to the controller when it is activated;

[0068] The regulating door button is used to send the regulating door opening signal to the controller when it is activated;

[0069] The regulating door sensor is used to send the regulating door opening signal to the controller when sensing that the regulating door is lifted;

[0070] The controller is further configured to control the regulating door to open to the first safety level when receiving the regulating door opening signal;

[0071] The human body sensor is also used to send an adjustment door closing signal to the controller for controlling the adjustment door to close to a preset second safety level when the experimenter exits the front of the cabinet;

[0072] The controller is further configured to control the regulating door to close to the second safety level when receiving the regulating door closing signal.

[0073] Preferably, it further comprises: a first infrared sensor disposed on one side of the adjusting door in the vertical direction, and a second infrared sensor disposed on the other side of the adjusting door in the vertical direction, wherein the adjusting door can rise and fall in the vertical direction;

[0074] The first infrared sensor is used to emit infrared rays to the second infrared sensor when the regulating door rises or falls;

[0075] The second infrared sensor is used for sending a stop rising signal to the controller for controlling the regulating door to stop rising if the infrared ray is not received when the regulating door is rising or falling, and for sending a stop falling signal to the controller for controlling the regulating door to stop falling if the infrared ray is not received when the regulating door is falling;

[0076] The controller is further configured to control the regulating gate to stop rising when receiving the stop rising signal, and to control the regulating gate to stop falling when receiving the stop falling signal.

[0077] Preferably, it also includes: a remote module, used for allowing a user to read the status of the controller.

[0078] Preferably, it also includes: a remote visual device, and the user can view the conditions in the laboratory in real time by wearing the remote visual device.

[0079] Preferably, it also includes: a display screen located on the cabinet;

[0080] The display screen is used to display any one or more of the surface wind speed in the cabinet at the current moment, the air flow per unit time, the temperature, the height of the adjustable door, and the date.

[0081] It can be seen from the above technical solution that the laboratory intelligent exhaust system provided in the embodiment of the present application includes: a cabinet, an exhaust module, an exhaust duct, and an auxiliary airflow module. An adjustable door is provided on the cabinet, and a work surface is provided inside the cabinet. The experimenter can conduct experiments on the work surface by opening the adjustable door. The cabinet is provided with a first air outlet, and the first air outlet is connected to the exhaust duct, the exhaust duct is connected to the exhaust module, and the end of the exhaust duct is located in a safe area. Since the exhaust module can generate an airflow from outside the cabinet to inside the cabinet and then from inside the cabinet to the exhaust duct, the cabinet is in a negative pressure state, so that the gas in the cabinet can be discharged to a safe area through the exhaust duct along with the airflow, and when the opening degree of the adjusting door increases, the air flow rate generated by the exhaust module per unit time increases, which avoids the situation that when the opening degree of the adjusting door increases, the air flow rate generated by the exhaust module per unit time may not be able to make the cabinet in a negative pressure state, and cannot prevent the harmful gas in the cabinet from spreading in the laboratory, and when the opening degree of the adjusting door decreases, the air flow rate generated by the exhaust module per unit time decreases, which can prevent the harmful gas in the cabinet from spreading in the laboratory and save energy.

[0082] Furthermore, since a safety threshold for the opening degree of the adjusting door is preset, when the opening degree of the adjusting door reaches the safety threshold, the auxiliary airflow module blows air into the cabinet to maintain a negative pressure state in the cabinet, thereby avoiding the situation where when the opening degree of the adjusting door reaches the safety threshold, the exhaust module generates excessive airflow per unit time, which makes the airflow pattern in the cabinet unstable, thereby destroying the negative pressure state in the cabinet, enhances the anti-interference ability of the exhaust module, and further prevents harmful gases in the cabinet from spreading in the laboratory. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0084] Figure 1A schematic diagram of the structure of a laboratory intelligent exhaust system provided in an embodiment of the present application;

[0085] Figure 2 A schematic diagram of air flow in a cabinet of a laboratory intelligent exhaust system provided in an embodiment of the present application;

[0086] Figure 3 A schematic diagram of a light curtain formed by a laser provided in an embodiment of the present application.

[0087] Among them, 11-exhaust duct, 12-auxiliary air flow module, 13-adjusting door, 14-first air outlet, 15-air valve, 16-fan, 17-fire extinguishing start button, 18-window, 19-spoiler detector, 20-work surface control button, 21-human body sensor, 22-display screen, 23-laser, 24-opening area, 25-door frame, 26-light curtain. DETAILED DESCRIPTION

[0088] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0089] See also Figure 1 , Figure 1 A structural schematic diagram of a laboratory intelligent exhaust system provided in an embodiment of the present application, the laboratory intelligent exhaust system provided in an embodiment of the present application may include: a cabinet 10, an exhaust module, an exhaust duct 11, and an auxiliary airflow module 12, the cabinet is provided with an adjusting door 13, a work surface (not marked in the figure) is provided in the cabinet 10, and the experimenter can conduct experiments on the work surface by opening the adjusting door 13, the cabinet 10 is provided with a first air outlet 14, the exhaust module may include an air valve 15 and a fan 16, the air valve 15 is provided at the first air outlet 14, the air valve 15 and the fan 16 are connected through the exhaust duct 11, the first air outlet 14 is connected to the exhaust duct 11, and the end of the exhaust duct 11 is located in a safe area.

[0090] The exhaust module is used to generate an airflow from the outside of the cabinet 10 to the inside of the cabinet 10, and then from the inside of the cabinet 10 to the exhaust duct 11, so that the inside of the cabinet 10 is in a negative pressure state. When the opening degree of the regulating door 13 increases, the air volume generated by the exhaust module per unit time increases. When the opening degree of the regulating door 13 decreases, the air volume generated by the exhaust module per unit time decreases. Optionally, when the air valve 15 is opened, the fan 16 can extract air from the cabinet 10 to generate an airflow from the outside of the cabinet 10 to the inside of the cabinet 10, and then from the inside of the cabinet 10 to the exhaust duct 11. See Figure 2 , Figure 2 It is a schematic diagram of the air flow in the cabinet of the laboratory intelligent exhaust system. In the cabinet 10, there is an air flow that flows from the outside of the cabinet 10 to the inside of the cabinet 10, and then flows from the inside of the cabinet 10 through the air valve 15 to the exhaust duct 11.

[0091] Specifically, in order to prevent the leakage of harmful gases generated by the experimenters on the work surface in the cabinet 10, the exhaust module generates an airflow from the outside of the cabinet 10 to the inside of the cabinet 10, and then from the inside of the cabinet 10 to the exhaust duct 11, so that the cabinet 10 is in a negative pressure state, that is, the air pressure in the cabinet 10 is lower than the air pressure of the external environment, so that the gas in the cabinet 10 will not diffuse to the outside of the cabinet 10, and can be discharged to a safe area through the exhaust duct 11 with the airflow. Considering that when the opening degree of the adjustment door 13 increases, the airflow generated by the exhaust module per unit time may not make the cabinet 10 in a negative pressure state, and cannot prevent the harmful gases in the cabinet 10 from diffusing in the laboratory, so when the opening degree of the adjustment door 13 increases, the airflow generated by the exhaust module per unit time increases. In order to save energy, when the opening degree of the adjustment door 13 decreases, the airflow generated by the exhaust module per unit time decreases. Among them, the airflow generated by the exhaust module per unit time is the air circulation volume per unit time in the cabinet 10.

[0092] The auxiliary airflow module 12 is used to blow air into the cabinet 10 to maintain a negative pressure state in the cabinet 10 when the opening degree of the adjustment door 13 reaches a preset safety threshold.

[0093] Specifically, when the opening degree of the adjusting door 13 reaches a certain degree, if the opening degree is further increased, even if the air flow rate generated by the exhaust module per unit time increases, it may cause gas leakage in the cabinet 10. This is because the excessive air flow rate generated by the exhaust module per unit time makes the air flow pattern in the cabinet unstable, thereby destroying the negative pressure state in the cabinet. Therefore, the embodiment of the present application presets a safety degree threshold. When the opening degree of the adjusting door 13 reaches the safety degree threshold, the auxiliary air flow module 12 blows air into the cabinet 10 to maintain the negative pressure state in the cabinet 10 and avoid gas leakage in the cabinet 10.

[0094] The laboratory intelligent exhaust system provided in the embodiment of the present application includes: a cabinet 10, an exhaust module, an exhaust duct 11, and an auxiliary airflow module 12. An adjustable door 13 is provided on the cabinet 10, and a work surface is provided in the cabinet 10. Experimenters can conduct experiments on the work surface by opening the adjustable door 13. The cabinet 10 is provided with a first air outlet 14, and the first air outlet 14 is connected to the exhaust duct 11. The exhaust duct 11 is connected to the exhaust module, and the end of the exhaust duct 11 is located in a safe area. Since the exhaust module can generate an airflow that flows from outside the cabinet 10 to inside the cabinet 10 and then from inside the cabinet 10 to the exhaust duct 11, the cabinet 10 is in a negative pressure state, so that the gas in the cabinet 10 can be discharged to a safe area along with the airflow through the exhaust duct 11. When the opening degree of the adjusting door 13 increases, the air flow rate generated by the exhaust module per unit time increases, which avoids the situation that when the opening degree of the adjusting door increases, the air flow rate generated by the exhaust module per unit time may not be able to make the cabinet 10 in a negative pressure state, and cannot prevent the harmful gas in the cabinet 10 from spreading in the laboratory. When the opening degree of the adjusting door 13 decreases, the air flow rate generated by the exhaust module per unit time decreases, which can prevent the harmful gas in the cabinet 10 from spreading in the laboratory and save energy.

[0095] Furthermore, since a safety threshold value for the opening degree of the adjusting door 13 is preset, when the opening degree of the adjusting door 13 reaches the safety threshold value, the auxiliary airflow module 12 blows air into the cabinet 10 to maintain a negative pressure state in the cabinet 10, thereby avoiding the situation in which when the opening degree of the adjusting door 13 reaches the safety threshold value, the exhaust module generates an excessive amount of airflow per unit time, which makes the airflow pattern in the cabinet 10 unstable, thereby destroying the negative pressure state in the cabinet 10, thereby enhancing the anti-interference ability of the exhaust module and preventing harmful gases in the cabinet 10 from spreading in the laboratory.

[0096] Optionally, the above-mentioned laboratory intelligent exhaust system may also include a controller, which is used to control the air valve 15 to open when the regulating door 13 is opened, and when the opening degree of the regulating door 13 increases, the opening degree of the air valve 15 is increased to increase the air volume generated by the fan 16 per unit time, and when the opening degree of the regulating door 13 decreases, the opening degree of the air valve 15 is reduced to reduce the air volume generated by the fan 16 per unit time. Among them, the controller can be set at the top of the cabinet 10 outside the cabinet 10. When the opening degree of the regulating door 13 is a preset minimum opening degree, the air valve 15 is controlled to open to the opening degree corresponding to the minimum opening degree, so that the air volume generated by the fan 16 per unit time reaches the preset minimum air volume, and only a small amount of air volume is used to ensure that the airflow flows from the outside of the cabinet 10 to the inside of the cabinet 10, and energy saving is achieved at the same time.

[0097] Optionally, considering that when a person walks in front of the adjustment door 13, an interfering airflow may be generated, and the interfering airflow may cause the gas in the cabinet 10 to be taken out, based on this, the auxiliary airflow module 12 can blow air into the cabinet 10 by blowing air toward a preset second air outlet, wherein the second air outlet can be set at the following two positions:

[0098] The first one can be arranged on a side panel near the adjusting door 13 in the cabinet 10 .

[0099] The second type: it can be set on the side above the work surface close to the adjustment door 13.

[0100] Optionally, the auxiliary airflow 12 may include: a bellows disposed outside the cabinet 10, and a first air pipe connected to the bellows, and the first air pipe may be in communication with the second air outlet.

[0101] In the embodiment of the present application, the auxiliary airflow module 12 can blow air into the cabinet 10 by blowing air toward a preset second air outlet. The second air outlet can be set on a side panel near the adjusting door 13 in the cabinet 10, or can be set on a side above the work surface near the adjusting door 13. This can prevent the gas in the cabinet 10 from being brought out when a person walks in front of the adjusting door 13, thereby preventing gas leakage in the cabinet 10.

[0102] In order to ensure the safety of the laboratory environment and the experimenters, the above-mentioned laboratory intelligent exhaust system may further include: a gas leakage detection device, which detects whether the gas in the cabinet 10 leaks out of the cabinet 10. In the embodiment of the present application, two optional gas leakage devices are provided, namely:

[0103] The first type: a smoke generator is arranged in the cabinet 10, which is used to generate smoke in the cabinet 10, so that when the exhaust module generates airflow, the experimenter can judge whether the gas in the cabinet has leaked out of the cabinet 10 according to whether the smoke generated in the cabinet 10 overflows outside the adjustment door 13. The smoke generator can be arranged on the top of the cabinet 10 in the cabinet 10.

[0104] Specifically, a smoke generator can generate smoke in the cabinet 10. When gas leakage occurs in the cabinet 10, the smoke in the cabinet 10 will overflow to the outside of the adjusting door 13. When no gas leakage occurs in the cabinet 10, the smoke in the cabinet 10 will not overflow to the outside of the adjusting door 13. Therefore, when the exhaust module generates airflow, the experimenter can judge whether the gas in the cabinet has leaked to the outside of the cabinet 10 based on whether the smoke generated in the cabinet 10 overflows to the outside of the adjusting door 13.

[0105] Optionally, a smaller opening may be opened on the cabinet 10 to observe whether smoke floats out of the opening. Smoke oil may be stored in the smoke generator, and smoke is generated by heating the smoke oil. Since the smoke oil is depleted and needs to be replaced regularly, an audible and visual alarm device may be provided. When the usage time of the smoke oil reaches a preset time threshold, the audible and visual alarm device is triggered to prompt the staff to replace it.

[0106] Optionally, the cabinet 10 is provided with a door frame 25 that cooperates with the adjustment door 13, and the adjustment door 13 is slidably arranged in the door frame 25. When the experimenter is in the cabinet 10 to conduct an experiment, the adjustment door 13 is in a preset open state. Figure 3 , when the adjusting door 13 is in a preset open state, an open area 24 is formed in the area surrounded by the door frame 25. A laser 23 is provided on the portion of the door frame 25 corresponding to the open area 24, and the laser 23 emits a laser to the open area 24 to form a light curtain 26 parallel to the adjusting door 13, and the light curtain 26 is filled in the open area. The light curtain 26 can fill a part of the open area, or fill the entire open area. The optimal state is that the light curtain 26 fills the entire open area. The smoke in the cabinet 10 can be clearly seen when it moves to the light curtain 26. The inspector can observe whether the smoke flows through the light curtain 26 to the outside of the cabinet 10 through the light curtain 26. If yes, it proves that there is a leak in the cabinet 10. If not, it proves that there is no leak in the cabinet 10. In addition, the inspector can also observe the flow direction of the smoke flowing to the vicinity of the light curtain 26 through the light curtain 26. If it is observed that the smoke flowing to the vicinity of the light curtain 26 has a more obvious trend of flowing toward the first air outlet 14, it proves that the cabinet 10 has a reliable anti-leakage function. If it is observed that the smoke flowing to the vicinity of the light curtain 26 has a weak tendency to flow toward the first air outlet 14 , it is proved that the anti-leakage function of the cabinet 10 is slightly weak.

[0107] In order to facilitate the up and down sliding of the adjusting door 13, a slideway that slides with the adjusting door 13 can be provided on the door frame 25 of the cabinet 10. The slideways are arranged relatively, and there are two slideways distributed on the left and right. The left and right sides of the adjusting door 13 are respectively matched in the two slideways. In this embodiment, a groove is provided on the slideway, and the laser 23 is embedded in the groove. A groove is provided on each slideway, and a laser 23 is embedded in each groove. The laser heads of the left and right lasers 23 are arranged relatively. In the present invention, the laser 23 is preferably a straight laser. The laser 23 can be recessed in the groove, can partially protrude outside the groove, or can be just flatly embedded. Preferably, the laser 23 is flatly embedded in the groove, so that it can ensure that the adjusting door 13 will not interfere with the laser 23, and at the same time prevent the groove from constraining the laser.

[0108] Each laser 23 emits to form a fan-shaped light curtain with the laser 23 as the emission point and extending toward the opposite laser 23. The farther end of the light curtain 26 emitted by each laser 23 just covers the blank area formed by the opposite laser 23 near the emission point, so as to ensure that the open area 24 is covered by the light curtain 26 as much as possible. In addition, the laser head of the laser 23 can be set to be angle-adjustable. After the laser 23 is installed, the angle of the laser head is adjusted to ensure that the emitted light curtain 26 is parallel to the plane where the adjustment door 13 is located.

[0109] In this embodiment, the groove for installing the laser 23 is set on the slide to ensure that the light curtain 26 is located in the open area 24 as much as possible, rather than close to the inside of the cabinet 10 relative to the open area 24. Such a setting can more accurately detect whether smoke will leak from the open area 24. If the laser 23 is set at a position closer to the inside of the cabinet 10 relative to the slide, a light curtain will be formed at a position closer to the inside of the cabinet 10 relative to the open area 24. In this case, even if smoke is seen in the light curtain, it is impossible to determine whether there is a leak, because the smoke in the light curtain may leak out of the cabinet 10, or it may detour to the inside of the cabinet 10 and eventually be discharged through the exhaust duct 11. In addition, after the experiment is over, after the adjustment door 13 is closed, the side wall of the adjustment door 13 will close the groove, thereby protecting the laser 23 in the groove. The groove can extend along the length direction of the slide to facilitate adjusting the installation position of the laser 23 according to the open area 24.

[0110] The signal line of the laser 23 is connected to the controller for communication. When gas leakage detection is required, the laser is controlled by the controller to emit laser.

[0111] The second type: a gas storage device arranged outside the cabinet 10, a gas releaser arranged inside the cabinet 10 and a gas detector arranged outside the cabinet 10. The gas storage device is used to transmit the stored safety gas to the gas releaser through a second air pipe embedded in the side panel of the cabinet 10. The gas releaser is used to release the safety gas inside the cabinet 10. The gas detector is used to detect whether safety gas appears in the gas outside the cabinet 10 when the exhaust module generates airflow. If so, it indicates that the gas inside the cabinet 10 has leaked to the outside of the cabinet 10. If not, it indicates that the gas inside the cabinet 10 has not leaked to the outside of the cabinet 10.

[0112] Specifically, the safety gas may be carbon monoxide at a safe concentration. When a gas leak occurs in the cabinet 10, the safety gas released by the gas releaser in the cabinet 10 will diffuse to the outside of the cabinet 10, and then the gas detector will detect whether the safety gas appears in the gas outside the cabinet 10. If so, it indicates that the gas in the cabinet 10 has leaked to the outside of the cabinet 10, and if not, it indicates that the gas in the cabinet 10 has not leaked to the outside of the cabinet 10.

[0113] Optionally, a smaller opening may be opened on the cabinet 10, and a gas detector may be arranged near the opening. The gas detector may detect the gas value of the safety gas. If the gas value of the safety gas detected by the gas detector is 0, it indicates that the gas in the cabinet 10 has not leaked out of the cabinet 10. If the gas value of the safety gas detected by the gas detector is not 0, it indicates that the gas in the cabinet 10 has leaked out of the cabinet 10. The gas releaser may be arranged on the top of the cabinet 10 inside the cabinet 10, and the gas detector may be arranged near the opening opened on the cabinet 10.

[0114] In the embodiment of the present application, the laboratory intelligent exhaust system also includes a gas leakage detection device, which detects whether the gas in the cabinet 10 leaks out of the cabinet 10, thereby ensuring the safety of the laboratory environment and experimenters.

[0115] Optionally, considering that the experimenter will conduct experiments on the work surface in the cabinet 10, the experiment may not only produce harmful gases, but also cause fires due to improper operation of the experimenter. Based on this, the above-mentioned laboratory intelligent exhaust system may also include: a fire extinguishing device arranged in the cabinet 10, which is used to extinguish the fire when a fire occurs in the cabinet 10. The fire extinguishing device may include: a fire sensor for detecting whether a fire occurs in the cabinet 10, and a fire extinguisher for spraying a fire extinguishing agent when a fire occurs in the cabinet 10. Among them, the fire sensor and the fire extinguisher can be arranged on the top of the cabinet 10 in the cabinet 10.

[0116] Based on this, three optional fire extinguishing methods are provided in the embodiment of the present application, namely:

[0117] First, when the fire sensor detects a fire in the cabinet 10, it sends a fire extinguishing signal to the fire extinguisher, and the fire extinguisher sprays a fire extinguishing agent when receiving the fire extinguishing signal.

[0118] Specifically, when the fire sensor detects a fire in the cabinet, it can directly send a fire extinguishing signal to the fire extinguisher, so that the fire extinguisher sprays the fire extinguishing agent when receiving the fire extinguishing signal.

[0119] The second type is that the above-mentioned laboratory intelligent exhaust system also includes a remote terminal. When the fire sensor detects a fire in the cabinet 10, it sends a fire signal to the controller to indicate that a fire has occurred in the cabinet 10. The controller forwards the fire signal to the remote terminal. When the remote terminal receives the fire signal, it can send a fire extinguishing signal to the fire extinguisher. When the fire extinguisher receives the fire extinguishing signal, it sprays a fire extinguishing agent.

[0120] Specifically, when the fire sensor detects a fire in the cabinet 10, it can send a fire signal to the controller to indicate that a fire has occurred in the cabinet 10. The controller sends the fire signal to a remote terminal so that people who are not in the laboratory can learn about the fire in the cabinet 10 through the remote terminal. When the remote terminal receives the fire signal, it can send a fire extinguishing signal to the fire extinguisher so that the fire extinguisher sprays a fire extinguishing agent when it receives the fire extinguishing signal.

[0121] The third type: See Figure 1 The above-mentioned laboratory intelligent exhaust system also includes a fire extinguishing start button 17. When the fire extinguishing start button 17 is activated, the fire extinguisher sprays the fire extinguishing agent.

[0122] Specifically, a fire extinguishing start button 17 may be provided, and the fire extinguishing start button 17 may be manually started by laboratory personnel. When the fire extinguishing start button 17 is started, the fire extinguisher sprays the fire extinguishing agent.

[0123] In the embodiment of the present application, it is taken into consideration that the experimenters will conduct experiments on the work surface in the cabinet 10. The experiments may not only produce harmful gases but may also cause fires due to improper operation of the experimenters. Therefore, a fire extinguishing device is provided in the cabinet 10. When a fire occurs in the cabinet 10, the fire extinguishing device extinguishes the fire, thereby ensuring the safety of the experimental environment and the experimenters.

[0124] Optionally, the fire sensor may include any one or more types of fire sensors among a smoke sensor, a temperature sensor, and a flame detector. The fire sensor may support the experimenter to control its opening state. The fire sensor may be arranged on the top of the cabinet 10 in the cabinet 10.

[0125] Specifically, the smoke sensor determines whether a fire occurs in the cabinet 10 by detecting whether there is smoke in the cabinet 10, the temperature sensor determines whether a fire occurs in the cabinet 10 by detecting whether the temperature in the cabinet 10 exceeds a set temperature threshold, and the flame detector determines whether a fire occurs in the cabinet 10 by detecting whether there is flame in the cabinet 10. Considering that the experiment conducted by the experimenter in the cabinet 10 will produce smoke, high temperature, flame, etc., when the experiment produces smoke, the smoke sensor will detect the smoke and mistakenly judge that a fire occurs in the cabinet 10; when the experiment produces high temperature, the temperature sensor will detect the high temperature and mistakenly judge that a fire occurs in the cabinet 10; when the experiment produces flame, the flame detector will detect the flame and mistakenly judge that a fire occurs in the cabinet 10, thereby causing an experimental accident. Therefore, the smoke sensor, temperature sensor, flame detector and other fire sensors can only detect whether a fire occurs in the cabinet 10 after being turned on by the experimenter to avoid misjudgment, thereby causing an experimental accident.

[0126] In the embodiment of the present application, fire sensors such as smoke sensors, temperature sensors, and flame detectors can detect whether a fire has occurred in the cabinet 10 only after being turned on by the experimenter, thereby avoiding the situation where the experimenter's experiments in the cabinet 10 will generate smoke, high temperature, and flames, causing the fire sensor to mistakenly judge that a fire has occurred in the cabinet 10, thereby causing an experimental accident.

[0127] Optional, see Figure 1 In order to reduce the risk of leakage, a number of windows 18 can be installed on the above-mentioned adjustment door 13, and each window 18 can be opened and closed by the experimenter. When the experimenter needs to operate the experimental equipment on the workbench, there is no need to open the adjustment door 13 as a whole, and the corresponding window 18 can be opened. In order to facilitate the experimenter to observe the experimental conditions in the cabinet 10, the window 18 can be made of transparent glass, and the window 18 can be moved left and right. In order to avoid gas leakage in the cabinet 10 due to insufficient air flow generated by the fan 16 per unit time when the window 18 is opened, the above-mentioned controller can also adjust the opening degree of the air valve 15 according to the opening state of each window 18. For example, when the window 18 is opened, the controller increases the opening degree of the air valve 15, and when the window 18 is closed, the controller reduces the opening degree of the air valve 15.

[0128] In order to enable the controller to adjust the opening degree of the air valve 15 according to the opening state of each window 18, a window sensor corresponding to each window 18 may be provided on the adjusting door 13. The window sensor is used to send a window opening signal to the controller to indicate that the window 18 is open when it senses that the corresponding window 18 is open, and send a window closing signal to the controller to indicate that the window 18 is closed when it senses that the corresponding window 18 is closed. When the controller receives the window opening signal, it increases the opening degree of the air valve 15, and when it receives the window closing signal, it reduces the opening degree of the air valve 15.

[0129] The adjusting door 13 may be provided with a door frame, and each window 18 may be installed on the door frame. A corresponding window sensor may be provided at the position of each window 18 on the door frame.

[0130] In an embodiment of the present application, a plurality of windows 18 are installed on the adjusting door 13, and each window 18 can be opened and closed by the experimenter. When the experimenter needs to operate the experimental equipment on the workbench, there is no need to open the adjusting door 13 as a whole, thereby reducing the risk of gas leakage in the cabinet 10. When the window 18 is opened, the controller increases the opening degree of the air valve 15, and when the window 18 is closed, the controller reduces the opening degree of the air valve 15, thereby avoiding gas leakage in the cabinet 10 due to insufficient air flow generated by the fan 16 per unit time when the window 18 is opened.

[0131] Optionally, taking into account that some abnormal situations may occur inside or outside the cabinet 10, in order for the staff to be informed of the abnormalities inside or outside the cabinet 10 in a timely manner, the embodiment of the present application pre-sets abnormal conditions. The above-mentioned laboratory intelligent exhaust system may also include: a sound and light alarm device. The controller is also used to send an alarm signal to the sound and light alarm device when it is determined that the set abnormal conditions are met. The sound and light alarm device is used to perform a sound and light alarm when the alarm signal is received.

[0132] Specifically, when the sound and light alarm device receives an alarm signal, it can perform a sound and light alarm by emitting sound and light signals.

[0133] The abnormal conditions may include any one or more of the following:

[0134] The surface wind speed in the cabinet 10 exceeds a preset surface wind speed threshold.

[0135] Specifically, the face wind speed refers to the distance that the airflow flowing from the outside of the cabinet 10 to the inside of the cabinet 10 moves in a unit time, perpendicular to the adjusting door 13. The embodiment of the present application presets a face wind speed threshold. When the face wind speed in the cabinet 10 exceeds the preset face wind speed threshold, it may cause the airflow in the cabinet 10 to be turbulent, causing the gas in the cabinet 10 to leak. Therefore, when the face wind speed in the cabinet 10 exceeds the face wind speed threshold, an audible and visual alarm is performed to alert the staff. Optionally, a face wind speed sensor can be set on the side panel of the cabinet 10 close to the adjusting door 13 to detect the face wind speed in the cabinet 10 in real time and send it to the controller, which determines whether the face wind speed in the cabinet 10 exceeds the preset face wind speed threshold.

[0136] The air flow rate generated by the fan 16 per unit time exceeds a preset air flow rate threshold.

[0137] Specifically, the excessive amount of airflow generated by the fan 16 per unit time will make the airflow pattern in the cabinet 10 unstable, thereby destroying the negative pressure state in the cabinet 10, causing gas leakage in the cabinet 10. Therefore, the embodiment of the present application presets an airflow threshold. When the airflow generated by the fan 16 per unit time exceeds the preset airflow threshold, an audible and visual alarm is performed to remind the staff. Optionally, an air volume sensor can be set in the cabinet 10 to detect the airflow generated by the fan 16 per unit time in the cabinet 10 in real time, and send it to the controller, which determines whether the airflow generated by the fan 16 per unit time exceeds the preset airflow threshold.

[0138] The wind speed of the interfering airflow outside the cabinet 10 exceeds a preset first wind speed threshold.

[0139] Specifically, the interfering airflow outside the cabinet 10 is an irregular airflow around the cabinet 10. When the wind speed of the interfering airflow outside the cabinet 10 is too high, it will affect the airflow pattern inside the cabinet 10, causing gas leakage inside the cabinet 10. Therefore, the embodiment of the present application presets a first wind speed threshold. When the wind speed of the interfering airflow outside the cabinet 10 exceeds the preset first wind speed threshold, an audible and visual alarm is performed to remind the staff. Optional, see Figure 1 A disturbance detector 19 may be provided outside the cabinet 10 to detect in real time the airflow volume of the disturbing airflow outside the cabinet 10 and send the detected airflow volume to the controller, which determines whether the wind speed of the disturbing airflow outside the cabinet 10 exceeds a preset first wind speed threshold.

[0140] The fan 16 is operated at maximum power and the air valve 15 is opened to the maximum extent.

[0141] Specifically, when harmful gases leak, the fan 16 will usually run at the maximum power, and an audible and visual alarm should be given at this time to remind the personnel in the laboratory that the corresponding environment is unsafe.

[0142] A fire broke out in the cabinet 10.

[0143] Specifically, when a fire occurs in the cabinet 10, an audible and visual alarm should be sounded to remind personnel in the laboratory to put out the fire in time.

[0144] The temperature in the cabinet 10 exceeds a preset temperature threshold.

[0145] Specifically, when the temperature in the cabinet 10 is too high, the experimental equipment, experimental samples, etc. in the cabinet 10 may be damaged, so the embodiment of the present application presets a temperature threshold. When the temperature in the cabinet 10 exceeds the temperature threshold, an audible and visual alarm is performed to alert the personnel in the laboratory. Optionally, a temperature sensor can be set on the top or side wall of the cabinet 10 in the cabinet 10 to detect the temperature in the cabinet 10 in real time and send it to the controller, which determines whether the temperature in the cabinet 10 exceeds the preset temperature threshold.

[0146] The opening degree of the regulating door 13 exceeds the safety degree threshold.

[0147] Specifically, when the experimenter is conducting an experiment in the cabinet, the regulating door 13 is in an open state. When the regulating door 13 is opened too much, the negative pressure state in the cabinet 10 may be destroyed, so the embodiment of the present application presets a safety level threshold. When the opening level of the regulating door 13 exceeds the safety level threshold, an audible and visual alarm is performed to remind the experimenter.

[0148] Furthermore, the adjusting door 13 in the specific embodiment of the present application is a sliding door that can move up and down. The adjusting door 13 slides upward to open; slides downward to close. The specific embodiment of the present application reflects the opening degree of the adjusting door 13 by adjusting the height of the door 13. The higher the height of the adjusting door 13, the greater the opening degree. The lower the height of the adjusting door 13, the smaller the opening degree. The opening height of the adjusting door 13 has a preset safety height threshold. When the adjusting door 13 is within the preset safety height threshold, it can ensure that the cabinet 10 is in a negative pressure state. In this specific embodiment, a second visual recognition camera is provided, and the second visual recognition camera is used to identify the opening height of the adjusting door 13. When the second visual recognition camera recognizes that the opening height of the adjusting door 13 exceeds the preset safety height threshold, the controller makes a judgment that the set abnormal condition is met, thereby triggering the sound and light alarm device to sound and light alarm, so as to prompt the experimenter to lower the adjusting door 13 to within the preset safety height threshold. Furthermore, when the second viewing angle recognition camera recognizes that the opening height of the adjustment door 13 exceeds the preset safety height threshold, the controller controls the adjustment door 13 to descend, that is, the adjustment door 13 is automatically raised. When the second viewing angle recognition camera recognizes that the adjustment door 13 has descended to within the preset safety height threshold, the controller controls the adjustment door 13 to stop descending. Specifically, the adjustment door 13 can be driven by a motor and a transmission chain. When the controller needs to control the adjustment door 13 to descend, it can be controlled by controlling the motor to rotate in the corresponding direction.

[0149] The placement of experimental equipment on the workbench exceeds the set range.

[0150] Specifically, experimental equipment is usually placed on the work surface in the cabinet 10. The embodiment of the present application sets the range of experimental equipment placement. When the placement of the experimental equipment exceeds the set range, an audible and visual alarm should be performed to remind the experimenter. For example: the placement range of the experimental equipment is within 150mm behind the adjustment door, and the distance between the experimental equipment and the side panels on the left and right sides is within 50mm. If it exceeds the set range, the experimental equipment will block the airflow, affect the circulation of the airflow, and destroy the negative pressure state in the cabinet 10. Therefore, this embodiment limits the experimental equipment to a set range to ensure the smoothness of the airflow in the cabinet 10, thereby ensuring that the cabinet 10 maintains a negative pressure state and effectively prevents the harmful gas in the cabinet 10 from leaking out. Optionally, a first-angle recognition camera is set at the corner of the top plate in the cabinet 10, and the first-angle recognition camera is used to identify whether the experimental equipment is within the set range. If the first-angle recognition camera identifies that the experimental equipment exceeds the set range, then the audible and visual alarm device is triggered to alarm to prompt the experimenter to place the experimental equipment within the set range.

[0151] The set materials need to be replenished or replaced.

[0152] The set material can be the smoke oil in the smoke releaser or the safety gas in the gas releaser.

[0153] Specifically, the smoke oil in the smoke releaser and the safety gas in the gas releaser may need to be replenished or replaced. When the smoke oil in the smoke releaser or the safety gas in the gas releaser needs to be replenished or replaced, an audible and visual alarm is given to remind the experimenter.

[0154] The actual usage time of the set module reaches the preset corresponding time threshold.

[0155] Among them, the set module can be used for each sensor, inductor, accessory, etc. of the laboratory intelligent exhaust system when the usage time reaches the preset time.

[0156] Specifically, in order to ensure that the laboratory intelligent exhaust system is in good working condition, when the usage time of each sensor, inductor, accessory, etc. of the laboratory intelligent exhaust system reaches the preset time, an audible and visual alarm will be issued to remind the experimenter to replace it.

[0157] In the embodiment of the present application, when the controller determines that the set abnormal conditions are met, it sends an alarm signal to the sound and light alarm device. When the sound and light alarm device receives the alarm signal, it makes an sound and light alarm, which can remind relevant personnel to deal with the abnormal situation in time.

[0158] Optionally, the sound and light alarm device may include: a sound generator and a display light, wherein the sound generator is used to emit an alarm sound when an alarm signal is received, and the display light is used to display a set first color when no alarm signal is received, and display a set second color or a third color when an alarm signal is received, wherein the surface wind speed in the cabinet 10 exceeds a preset surface wind speed threshold, or the air flow generated by the fan 16 per unit time exceeds a preset air flow threshold, or the wind speed of the interfering airflow outside the cabinet 10 exceeds a preset first wind speed threshold, or the fan 16 operates at maximum power and the opening degree of the air valve 15 is maximum, or a fire occurs in the cabinet 10, the display light displays the second color, and when the temperature in the cabinet 10 exceeds a preset temperature threshold, or the opening degree of the adjustment door 13 exceeds the safety threshold, or the placement of the experimental equipment on the work surface exceeds the set range, or the set materials need to be supplemented or replaced, or the actual usage time of the set module reaches the preset corresponding time threshold, the display light displays the third color.

[0159] Optionally, the first color may be green, the second color may be red, and the third color may be yellow.

[0160] Optionally, in order to avoid the situation where there are no relevant personnel in the laboratory and the abnormal situation cannot be handled in time when an abnormality occurs, the above-mentioned laboratory intelligent exhaust system may also include a remote terminal. The controller is also used to upload the abnormal situation to the remote terminal when it is determined that the set abnormal conditions are met, so that the user of the remote terminal can be informed of the abnormality in time and perform relevant processing.

[0161] Optionally, a spoiler detector 19 is provided outside the cabinet 10 and on the side where the regulating door 13 is located. Furthermore, the spoiler detector 19 can be provided on a panel above the regulating door 13. The spoiler detector 19 is used to detect the wind speed of the interfering airflow near the regulating door 13. When the spoiler detector 19 detects that the wind speed of the interfering airflow near the regulating door 13 exceeds the preset second wind speed threshold, the controller controls the exhaust module to increase the exhaust volume. Afterwards, when the spoiler detector 19 detects that the wind speed of the interfering airflow near the regulating door 13 is lower than the second wind speed threshold within a preset time, the controller controls the exhaust module to restore the initial exhaust volume. The initial exhaust volume is the exhaust volume of the exhaust module before the wind speed of the interfering airflow near the regulating door 13 does not exceed the preset second wind speed threshold.

[0162] The second wind speed threshold is less than the first wind speed threshold mentioned above. As can be seen from the above description, when the wind speed of the interfering airflow outside the cabinet 10 exceeds the preset first wind speed threshold, an audible and visual alarm is performed to remind the experimenter that the wind speed of the interfering airflow in the environment where the cabinet 10 is located is large and is not suitable for the experiment. When the disturbance detector 19 detects that the wind speed of the interfering airflow near the regulating door 13 exceeds the preset second wind speed threshold and is less than the first wind speed threshold, it means that there is an interfering airflow near the regulating door 13, but the wind speed of the interfering airflow is not too large, and the exhaust volume of the exhaust module can be increased to avoid the interfering airflow from sucking out the harmful gas in the cabinet 10. On the other hand, after increasing the exhaust volume of the exhaust module, more airflow in front of the regulating door 13 will be prompted to enter the cabinet 10, so that the interfering airflow can be destroyed or even eliminated. When the disturbance detector 19 detects that the wind speed of the interfering airflow near the regulating door 13 is lower than the second wind speed threshold within the preset time, it means that the interfering airflow has been eliminated, and the controller controls the exhaust module to return to the initial exhaust volume. The specific operation of increasing the exhaust volume of the exhaust module is to increase the power of the fan 16 and / or increase the opening of the air valve 15.

[0163] Optionally, in order to facilitate the experimenter to conduct experiments and observe experiments on the work surface, a lighting lamp can be set in the cabinet 10, and the controller can adjust the color temperature and stepless brightness of the lighting lamp according to the lighting mode selected by the experimenter. Among them, the lighting lamp can be set on the top of the cabinet 10 in the cabinet 10.

[0164] Optional, see Figure 1In order to facilitate experiments by experimenters of different heights, the above-mentioned laboratory intelligent exhaust system may further include: a work surface control button 20, and the controller is also used to control the work surface to rise or fall when the work surface control button is activated.

[0165] In the embodiment of the present application, several optional ways of opening the regulating door 13 are provided, namely:

[0166] The first one: See Figure 1 A human body sensor 21 is provided on the cabinet 10, and is used to send an adjusting door opening signal to the controller for controlling the adjusting door 13 to open to a preset first safety level when the experimenter is located in front of the cabinet 10. When the controller receives the adjusting door opening signal, it controls the adjusting door 13 to open to the first safety level.

[0167] Among them, the human body sensor 21 is also used to send an adjusting door closing signal to the controller for controlling the adjusting door 13 to close to a preset second safety level when the experimenter exits the front of the cabinet 10. When the controller receives the adjusting door closing signal, it controls the adjusting door 13 to close to the second safety level.

[0168] The second method is to set a foot switch on the cabinet 10 to send a regulating door opening signal to the controller when it is activated. When the controller receives the regulating door opening signal, it controls the regulating door 13 to open to the first safety level.

[0169] The third method is to set an adjusting door button on the cabinet 10, which is used to send an adjusting door opening signal to the controller when it is activated. When the controller receives the adjusting door opening signal, it controls the adjusting door 13 to open to the first safety level.

[0170] The fourth method is to set an adjusting door sensor on the cabinet 10 to sense that the adjusting door 13 is lifted and send an adjusting door opening signal to the controller. When the controller receives the adjusting door opening signal, it controls the adjusting door 13 to open to the first safety level.

[0171] Optionally, the above-mentioned adjusting door 13 can rise and fall in the vertical direction. Considering that the adjusting door 13 may touch other objects in the process of rising and falling, thereby damaging the adjusting door 13, in order to avoid damaging the adjusting door 13, the above-mentioned laboratory intelligent exhaust system may also include: a first infrared sensor arranged on one side of the adjusting door 13 in the vertical direction, and a second infrared sensor arranged on the other side of the adjusting door 13 in the vertical direction.

[0172] The first infrared sensor is used to emit infrared rays to the second infrared sensor when the adjustment door 13 rises or falls.

[0173] Specifically, in order to prevent the adjusting door 13 from touching other objects when it rises or falls, the first infrared sensor emits infrared rays to the second infrared sensor when the adjusting door 13 rises or falls. If there are other objects above or below the adjusting door 13 when it rises or falls, the infrared rays will be cut off and the second infrared sensor will not receive the infrared rays.

[0174] The second infrared sensor is used to send a stop rising signal to the controller for controlling the adjusting door 13 to stop rising if no infrared rays are received when the adjusting door 13 rises, and to send a stop descending signal to the controller for controlling the adjusting door 13 to stop descending if no infrared rays are received when the adjusting door 13 descends.

[0175] Specifically, when the adjusting door 13 rises, if the second infrared sensor cannot receive infrared rays, it means that there are other objects above the adjusting door 13. At this time, the adjusting door 13 should be controlled to stop rising. When the adjusting door 13 descends, if the second infrared sensor cannot receive infrared rays, it means that there are other objects below the adjusting door 13. At this time, the adjusting door 13 should be controlled to stop descending.

[0176] The controller is also used to control the regulating door 13 to stop rising when receiving a stop rising signal, and to control the regulating door 13 to stop falling when receiving a stop falling signal.

[0177] In the embodiment of the present application, when the adjusting door 13 is rising or falling, a first infrared sensor arranged on one side of the adjusting door 13 in the vertical direction emits infrared rays to a second infrared sensor. When the adjusting door 13 rises, if the first infrared sensor does not receive the infrared rays, a stop rising signal for controlling the adjusting door 13 to stop rising is sent to a controller. When the adjusting door 13 falls, if the first infrared sensor does not receive the infrared rays, a stop falling signal for controlling the adjusting door 13 to stop falling is sent to the controller, thereby avoiding the situation where the adjusting door 13 may touch other objects during the rising and falling process, thereby damaging the adjusting door 13.

[0178] Optionally, in order to facilitate the experimenter to know the face wind speed in the cabinet 10, the air flow per unit time, the temperature, the height of the adjustment door 13, the date, etc. in real time, see Figure 1 The above-mentioned laboratory intelligent exhaust system may also include: a display screen 22 located on the cabinet 10, for displaying any one or more of the face wind speed, air volume, temperature, height of the adjustable door 13, and date in the cabinet 10 at the current moment.

[0179] Optionally, the above-mentioned laboratory intelligent exhaust system may also include a remote module for allowing a user to read the status of the controller.

[0180] Optionally, the above-mentioned laboratory intelligent exhaust system may also include: a remote visual device, by which users can view the conditions in the laboratory in real time by wearing the remote visual device, so as to facilitate remote debugging or troubleshooting.

[0181] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0182] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0183] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laboratory intelligent exhaust system, characterized in that: include: A cabinet, an exhaust module, an exhaust duct, and an auxiliary airflow module. The cabinet is provided with an adjustment door. A work surface is provided in the cabinet. An experimenter can conduct an experiment on the work surface by opening the adjustment door. The cabinet is provided with a first air outlet. The first air outlet is connected to the exhaust duct. The exhaust duct is connected to the exhaust module. The end of the exhaust duct is located in a safe area. The exhaust module is used to generate an airflow from outside the cabinet to inside the cabinet, and then from inside the cabinet to the exhaust duct, so that the cabinet is in a negative pressure state, wherein when the opening degree of the adjustment door increases, the airflow generated by the exhaust module per unit time increases, and when the opening degree of the adjustment door decreases, the airflow generated by the exhaust module per unit time decreases; The auxiliary airflow module is used to blow air into the cabinet when the opening degree of the adjustment door reaches a preset safety threshold, so as to maintain a negative pressure state in the cabinet.

2. The laboratory intelligent exhaust system according to claim 1 is characterized in that: The auxiliary airflow module blows air into the cabinet by blowing air toward a preset second air outlet, wherein the second air outlet is arranged on a side panel of the cabinet close to the adjustment door, and / or the second air outlet is arranged on a side above the work surface close to the adjustment door.

3. The laboratory intelligent exhaust system according to claim 2, characterized in that: The auxiliary airflow module includes: a bellows disposed outside the cabinet, and a first air pipe connected to the bellows, wherein the first air pipe is in communication with the second air outlet.

4. The laboratory intelligent exhaust system according to claim 1, characterized in that: Also includes: The gas leakage detection device is used to detect whether the gas in the cabinet leaks out of the cabinet.

5. The laboratory intelligent exhaust system according to claim 4 is characterized in that: The gas leakage detection device includes: a smoke generator arranged in the cabinet, used to generate smoke in the cabinet, so that when the exhaust module generates airflow, the experimenter can judge whether the gas in the cabinet leaks out of the cabinet according to whether the smoke generated in the cabinet overflows outside the adjustment door.

6. The laboratory intelligent exhaust system according to claim 5, characterized in that: The gas leakage detection device also includes a laser. The adjustment door can be slidably arranged in the door frame of the cabinet. When the experimenter is located in the cabinet to conduct an experiment, the adjustment door is in a preset open state to form an open area in the area surrounded by the door frame. The laser is arranged on a portion of the door frame corresponding to the open area. The laser of the laser forms a light curtain, which fills the open area. The light curtain visualizes the smoke flowing to the light curtain.

7. The laboratory intelligent exhaust system according to claim 6, characterized in that: The door frame is provided with a slideway matched with the adjusting door. The slideways are two and arranged opposite to each other. A groove is provided on each slideway. A laser is embedded in the groove. The laser heads of the two lasers are opposite to each other.

8. The laboratory intelligent exhaust system according to claim 4, characterized in that: The gas leakage detection device comprises: a gas storage device arranged outside the cabinet, a gas releaser arranged inside the cabinet, and a gas detector arranged outside the cabinet; The gas storage device is used to transmit the stored safety gas to the gas releaser through a second gas pipe embedded in the side panel of the cabinet; The gas releaser is used to release the safety gas in the cabinet; The gas detector is used to detect whether the safety gas appears in the gas outside the cabinet when the exhaust module generates airflow. If so, it indicates that the gas in the cabinet has leaked out of the cabinet; if not, it indicates that the gas in the cabinet has not leaked out of the cabinet.

9. The laboratory intelligent exhaust system according to claim 1, characterized in that: The exhaust module includes: a fan and an air valve arranged at the first air outlet, the air valve is connected to the fan through the exhaust duct, and when the air valve is opened, the fan draws air in the cabinet to generate an airflow that flows from outside the cabinet to inside the cabinet and then from inside the cabinet to the exhaust duct.

10. The laboratory intelligent exhaust system according to claim 9, characterized in that: Also includes: A controller for controlling the opening of the air valve after the regulating door is opened, and for increasing the opening degree of the air valve when the opening degree of the regulating door increases so as to increase the air flow rate generated by the fan per unit time, and for reducing the opening degree of the air valve when the opening degree of the regulating door decreases so as to reduce the air flow rate generated by the fan per unit time, and for controlling the opening of the air valve to the opening degree corresponding to the minimum opening degree when the opening degree of the regulating door is a preset minimum opening degree so as to make the air flow rate generated by the fan per unit time reach the preset minimum air flow rate.

11. The laboratory intelligent exhaust system according to claim 10, characterized in that: Also includes: The fire extinguishing device arranged in the cabinet is used to extinguish the fire when a fire occurs in the cabinet.

12. The laboratory intelligent exhaust system according to claim 11, characterized in that: The fire extinguishing device comprises: A fire sensor, used to detect whether a fire occurs in the cabinet; The fire extinguisher is used to spray fire extinguishing agent when a fire occurs in the cabinet.

13. The laboratory intelligent exhaust system according to claim 12, characterized in that: The fire sensor is also used to send a fire extinguishing signal to the fire extinguisher when a fire is detected in the cabinet; the fire extinguisher sprays a fire extinguishing agent when receiving the fire extinguishing signal.

14. The laboratory intelligent exhaust system according to claim 12, characterized in that: Also includes: a remote terminal; The fire sensor is further configured to send a fire signal indicating that a fire has occurred in the cabinet to the controller when a fire has occurred in the cabinet; The controller is also used to forward the fire signal to the remote terminal.

15. The laboratory intelligent exhaust system according to claim 14, characterized in that: The remote terminal is also used to send a fire extinguishing signal to the fire extinguisher when receiving the fire signal, and the fire extinguisher sprays a fire extinguishing agent when receiving the fire extinguishing signal.

16. The laboratory intelligent exhaust system according to claim 12, characterized in that: Also includes: A fire extinguishing start button, when the fire extinguishing start button is activated, the fire extinguisher sprays the fire extinguishing agent.

17. The laboratory intelligent exhaust system according to claim 12, characterized in that: The fire sensor includes: any one or more types of fire sensors among smoke sensors, temperature sensors, and flame detectors.

18. The laboratory intelligent exhaust system according to claim 10, characterized in that: A plurality of viewing windows are installed on the adjusting door, and each viewing window can be opened and closed by the experimenter.

19. The laboratory intelligent exhaust system according to claim 18, characterized in that: The controller is also used to adjust the opening degree of the air valve according to the opening state of each window.

20. The laboratory intelligent exhaust system according to claim 19, characterized in that: The adjusting door is provided with a window sensor corresponding to each window; A window sensor, for sending a window opening signal to the controller indicating that the window is open when sensing that the corresponding window is open, and for sending a window closing signal to the controller indicating that the window is closed when sensing that the corresponding window is closed; The controller increases the opening degree of the air valve when receiving the window opening signal, and decreases the opening degree of the air valve when receiving the window closing signal.

21. The laboratory intelligent exhaust system according to claim 10, characterized in that: Also includes: Sound and light alarm device; The controller is further configured to send an alarm signal to the sound and light alarm device when it is determined that a set abnormal condition is met; The sound and light alarm device is used to make a sound and light alarm when receiving the alarm signal.

22. The laboratory intelligent exhaust system according to claim 21, characterized in that: The set abnormal conditions include any one or more of the following: The surface wind speed in the cabinet exceeds a preset surface wind speed threshold; The air flow rate generated by the fan per unit time exceeds a preset air flow rate threshold; The wind speed of the interfering airflow outside the cabinet exceeds a preset first wind speed threshold; The fan is operated at maximum power and the air valve is opened to the maximum extent; A fire occurs in the cabinet; The temperature inside the cabinet exceeds a preset temperature threshold; The opening degree of the regulating door exceeds the safety degree threshold; The placement of the experimental equipment on the work surface exceeds the set range; The set materials need to be supplemented or replaced; The actual usage time of the set module reaches the preset corresponding time threshold.

23. The laboratory intelligent exhaust system according to claim 21, characterized in that: A first visual recognition camera is arranged on the top of the cabinet. If the first visual recognition camera detects that the placement of experimental equipment on the work surface exceeds a set range, the controller makes a judgment that the set abnormal condition is met, thereby triggering the sound and light alarm device to sound and light alarm.

24. The laboratory intelligent exhaust system according to claim 21, characterized in that: It also includes a second visual recognition camera, which is used to identify the opening height of the adjusting door. When the second visual recognition camera identifies that the opening height of the adjusting door exceeds a preset safety height threshold, the controller makes a judgment that the set abnormal condition is met, thereby triggering the sound and light alarm device to sound and light alarm.

25. The laboratory intelligent exhaust system according to claim 10, characterized in that: It also includes a second visual recognition camera, which is used to identify the opening height of the adjusting door. When the second visual recognition camera identifies that the opening height of the adjusting door exceeds a preset safety height threshold, the controller controls the adjusting door to descend. When the second visual recognition camera identifies that the adjusting door has descended to within the preset safety height threshold, the controller controls the adjusting door to stop descending.

26. The laboratory intelligent exhaust system according to claim 22, characterized in that: The sound and light alarm device comprises: a sound generator and a display light; The sound generator is used to emit an alarm sound when receiving the alarm signal; The display light is used to display a set first color when the alarm signal is not received, and to display a set second color or a third color when the alarm signal is received, wherein when the face wind speed in the cabinet exceeds a preset face wind speed threshold, or the airflow generated by the fan per unit time exceeds a preset airflow threshold, or the wind speed of the interfering airflow outside the cabinet exceeds a preset first wind speed threshold, or the fan operates at maximum power and the opening degree of the air valve is maximum, or a fire occurs in the cabinet, the display light displays the second color, and when the temperature in the cabinet exceeds a preset temperature threshold, or the opening degree of the adjustment door exceeds the safety threshold, or the placement of the experimental equipment on the work surface exceeds a set range, or the set materials need to be supplemented or replaced, or the actual usage time of the set module reaches the preset corresponding time threshold, the display light displays the third color.

27. The laboratory intelligent exhaust system according to claim 10, characterized in that: A disturbance flow detector is arranged outside the cabinet and on the side where the adjustment door is located, and the disturbance flow detector is used to detect the wind speed of the disturbance airflow near the adjustment door; When the spoiler detector detects that the wind speed of the interfering airflow near the adjusting door exceeds a preset second wind speed threshold, the controller controls the exhaust module to increase the exhaust volume. Thereafter, when the spoiler detector detects that the wind speed of the interfering airflow near the adjusting door is lower than the second wind speed threshold within a preset time, the controller controls the exhaust module to restore the initial exhaust volume.

28. The laboratory intelligent exhaust system according to claim 22, characterized in that: Also includes: a remote terminal; The controller is also used to upload the abnormal situation to the remote terminal when it is determined that the set abnormal condition is met.

29. The laboratory intelligent exhaust system according to claim 10, characterized in that: A lighting lamp is arranged in the cabinet; The controller is also used to adjust the color temperature and stepless brightness of the lighting lamp according to the lighting mode selected by the experimenter.

30. The laboratory intelligent exhaust system according to claim 10, characterized in that: Also includes: Work surface control buttons; The controller is also used to control the work surface to rise or fall when the work surface control button is activated.

31. The laboratory intelligent exhaust system according to claim 10, characterized in that: Also includes: Any one or more of a human body sensor, a foot switch, a door adjustment button, and a door adjustment sensor; The human body sensor is used to send an adjustment door opening signal to the controller for controlling the adjustment door to open to a preset first safety level when the experimenter is located in front of the cabinet; The foot switch is used to send the regulating door opening signal to the controller when it is activated; The regulating door button is used to send the regulating door opening signal to the controller when it is activated; The regulating door sensor is used to send the regulating door opening signal to the controller when sensing that the regulating door is lifted; The controller is further configured to control the regulating door to open to the first safety level when receiving the regulating door opening signal; The human body sensor is also used to send an adjustment door closing signal to the controller for controlling the adjustment door to close to a preset second safety level when the experimenter exits the front of the cabinet; The controller is further configured to control the regulating door to close to the second safety level when receiving the regulating door closing signal.

32. The laboratory intelligent exhaust system according to claim 31, characterized in that: Also includes: A first infrared sensor disposed on one side of the adjusting door in the vertical direction, and a second infrared sensor disposed on the other side of the adjusting door in the vertical direction, wherein the adjusting door can rise and fall in the vertical direction; The first infrared sensor is used to emit infrared rays to the second infrared sensor when the regulating door rises or falls; The second infrared sensor is used for sending a stop rising signal to the controller for controlling the regulating door to stop rising if the infrared ray is not received when the regulating door is rising or falling, and for sending a stop falling signal to the controller for controlling the regulating door to stop falling if the infrared ray is not received when the regulating door is falling; The controller is further configured to control the regulating gate to stop rising when receiving the stop rising signal, and to control the regulating gate to stop falling when receiving the stop falling signal.

33. The laboratory intelligent exhaust system according to claim 10, characterized in that: Also includes: The remote module is used for allowing the user to read the status of the controller.

34. The laboratory intelligent exhaust system according to claim 33, characterized in that: Also includes: A remote visual device, wherein the user can view the conditions in the laboratory in real time by wearing the remote visual device.

35. The laboratory intelligent exhaust system according to any one of claims 1 to 34, characterized in that: It also includes: a display screen located on the cabinet; The display screen is used to display any one or more of the surface wind speed in the cabinet at the current moment, the air flow per unit time, the temperature, the height of the adjustable door, and the date.

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