Intelligent exhaust fan for laboratory

Abstract

The utility model provides an intelligent exhaust fan for a laboratory, which comprises a turbofan and a programmable controller, and the turbofan and a motor are arranged in an air inlet pipeline of the fan. The utility model has the following beneficial effects: through the design that the sensor is integrated on the fan, the air exhaust and fan state can be monitored in real time, i.e., the fan state can be monitored in real time; a programmable controller, a differential pressure switch, a differential pressure sensor, a vibration measurement sensor, a frequency converter, a pipeline differential pressure sensor, a Hall rotating speed detection sensor, an infrared induction sensor and a temperature sensor are cooperatively controlled; therefore, wind pressure monitoring and control of a fan air inlet pipeline, working state monitoring of a motor and a turbofan, equipment rotating speed monitoring and other monitoring and control are achieved, specific fault positions can be conveniently judged at the first time when equipment breaks down, related personnel in a laboratory are timely informed through a data transmission channel, and starting and stopping operation is remotely carried out. And the crisis event processing time is shortened.

Description

Technical Field

[0001] The utility model relates to an intelligent laboratory exhaust fan, belonging to the field of laboratory exhaust fans. Background Art

[0002] Exhaust is very important in the laboratory. Once the exhaust gas leaks in the laboratory, the consequences are very serious. The exhaust fan is usually installed on the roof of the building. Whether the fan is abnormal can only be seen on the roof. The monitoring condition is poor, and it is impossible to self-diagnose where the fault is in the first time, which leads to serious consequences. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide an intelligent laboratory exhaust fan.

[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] A laboratory intelligent exhaust fan comprises a turbine fan and a programmable controller, wherein the turbine fan and the motor are arranged in an air inlet duct of the fan, a pressure difference switch and a pressure difference sensor are installed on the straight pipe section of the air inlet duct of the fan, the pressure difference switch and the pressure difference sensor are connected to the programmable controller, the turbine fan and the motor are both provided with vibration sensors, two of the vibration sensors are connected to the programmable controller, a control signal input end of the turbine fan is connected to a signal output end of a frequency converter, the signal input end of the frequency converter is connected to the programmable controller and the pipeline pressure difference sensor, the turbine fan is installed with a Hall speed detection sensor, an infrared induction sensor and a temperature sensor, and the Hall speed detection sensor is connected to the programmable controller.

[0006] Furthermore, the programmable controller is provided with an analog input terminal AI, an analog output terminal AO, a digital input terminal DI, a digital output terminal DO, a DC24V power supply and an RJ45 interface.

[0007] Furthermore, the pressure difference switch is connected to the digital input terminal DI on the programmable controller.

[0008] Furthermore, the differential pressure sensor, the Hall speed detection sensor, the temperature sensor, the infrared sensor and the vibration sensor are all connected to the analog input terminal AI on the programmable controller.

[0009] Furthermore, the differential pressure sensor, the Hall speed detection sensor, the temperature sensor, the infrared sensor and the vibration sensor are all connected to the DC24V power supply on the programmable controller.

[0010] Furthermore, the digital input terminal DI of the programmable controller is connected to the start / stop state signal output terminal of the frequency converter to form a start / stop state feedback loop.

[0011] Furthermore, the digital output terminal DO of the programmable controller is connected to the fan start / stop control signal input terminal of the programmable controller to form a start / stop control loop of the turbo fan.

[0012] Furthermore, the turbine fan includes fan blades and a motor, the output end of the motor is connected to the transmission belt and the transmission shaft of the fan blades through a pulley, the Hall speed detection sensor is installed on the pulley, the infrared sensing sensor is installed on the bracket on the side of the transmission belt, and the temperature sensor is installed on the housing of the motor.

[0013] Beneficial effects of the utility model:

[0014] Through the design of the pressure differential switch and the pressure differential sensor, when in use, the pressure differential switch and the pressure differential sensor are installed on the straight pipe section of the fan air inlet duct to monitor the air pressure in the duct and facilitate constant pressure control of the duct.

[0015] Through the design of the vibration sensor, when in use, the vibration sensor is installed on the motor and the turbine fan, and the working state of the motor and the turbine fan can be tested.

[0016] Through the design of the infrared sensing sensor, when in use, the infrared sensing sensor is installed on a bracket on the side of the transmission belt to monitor the state of the transmission belt.

[0017] Through the design of the Hall speed detection sensor, when in use, the Hall speed detection sensor is installed near the motor transmission gear to detect the speed of the equipment. Once a specific part fails, the sensor will compare the data, determine the specific fault location, and promptly notify the relevant laboratory personnel through the data transmission channel and perform start and stop operations remotely, shortening the time to deal with crisis events.

[0018] Through the coordinated setting of the programmable controller and the frequency converter, the problem of serious power consumption in the air inlet duct of the fan in the prior art can be solved, which has the characteristics and effects of ensuring the air quality of the laboratory and saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The utility model is a structural schematic diagram of a laboratory intelligent exhaust fan.

[0021] In the figure, 1. Turbine fan; 2. RJ45 interface; 3. Programmable controller; 4. Fan air inlet duct; 5. Pressure difference switch; 6. Pressure difference sensor; 7. Vibration sensor; 8. Frequency converter; 9. Pipe pressure difference sensor; 10. Hall speed detection sensor; 11. Infrared sensor; 12. Temperature sensor; 13. Analog input terminal AI; 14. Analog output terminal AO; 15. Digital input terminal DI; 16. Digital output terminal DO; 17. DC24V power supply. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1The utility model provides a technical solution for a laboratory intelligent exhaust fan, including a turbine fan 1 and a programmable controller 3. The turbine fan 1 and the motor are arranged in an air inlet duct 4 of the fan. A pressure difference switch 5 and a pressure difference sensor 6 are installed on the straight pipe section of the air inlet duct 4 of the fan. When in use, the pressure difference switch 5 and the pressure difference sensor 6 are installed on the straight pipe section of the air inlet duct of the fan to monitor the wind pressure of the air duct, so as to facilitate the constant pressure control of the air duct. The pressure difference switch 5 and the pressure difference sensor 6 are connected to the programmable controller 3. A vibration sensor 7 is provided on the turbine fan 1 and the motor. When in use, the vibration sensor 7 is installed on the motor and the turbine fan to test the working state of the motor and the turbine fan. The two vibration sensors 7 are connected to the programmable controller 3, and the control of the turbine fan 1 The signal input end is connected to the signal output end of the frequency converter 8, the signal input end of the frequency converter 8 is connected to the programmable controller 3 and the pipeline pressure difference sensor 9, the turbine fan 1 is equipped with a Hall speed detection sensor 10, an infrared sensor 11 and a temperature sensor 12, the Hall speed detection sensor 10 is connected to the programmable controller 3, the turbine fan 1 includes a fan blade and a motor, the output end of the motor is connected to the transmission belt and the transmission shaft of the fan blade through a pulley, the Hall speed detection sensor 10 is installed on the pulley, the infrared sensor 11 is installed on the bracket on the side of the transmission belt, and the temperature sensor 12 is installed on the housing of the motor. The temperature sensor 12 is used for motor temperature monitoring and is installed on the motor housing to determine whether the load is abnormal, resulting in excessive temperature;

[0024] The model of the differential pressure switch 5 is RVV-2*0.75-JDG20, the model of the differential pressure sensor 6 is RVVP-3*0.75-JDG2, the model of the vibration sensor 7 is RVVP-3*0.75-JDG20, the model of the pipeline differential pressure sensor 9 is RVVP-3*0.75-JDG20, the model of the Hall speed detection sensor 10 is RVVP-3*0.75-JDG20, the model of the infrared sensor 11 is RVVP-3*0.75-JDG20, and the model of the temperature sensor 12 is RVVP-3*0.75-JDG20.

[0025] See also Figure 1The programmable controller 3 is provided with an analog input terminal AI 13, an analog output terminal AO14, a digital input terminal DI 15, a digital output terminal DO16, a DC24V power supply 17 and an RJ45 interface 2. The differential pressure switch 5 is connected to the digital input terminal DI 15 on the programmable controller 3. The differential pressure sensor 6, the Hall speed detection sensor 10, the temperature sensor 12, the infrared sensor 11 and the vibration sensor 7 are all connected to the analog input terminal AI 13 on the programmable controller 3. The differential pressure sensor 6, the Hall speed detection sensor 10, the temperature sensor 12, the infrared sensor 11 and the vibration sensor 7 are all connected to the DC24V power supply 17 on the programmable controller 3. The programmable controller 3 can realize adaptive adjustment and control of the differential pressure switch 5, the differential pressure sensor 6, the vibration sensor 7, the frequency converter 8, the pipeline differential pressure sensor 9, the Hall speed detection sensor 10, the infrared sensor 11 and the temperature sensor 12.

[0026] See also Figure 1 The digital input terminal DI15 of the programmable controller 3 is connected to the start / stop state signal output terminal of the frequency converter 8 to form a start / stop state feedback loop, and the digital output terminal DO16 of the programmable controller 3 is connected to the fan start / stop control signal input terminal of the programmable controller 3 to form a start / stop control loop of the turbine fan 1; through the coordinated setting of the programmable controller 3 and the frequency converter 8, the problem of serious power consumption of the fan air inlet duct 4 in the prior art can be solved, and the characteristics and effects of ensuring the air quality of the laboratory and saving energy consumption are achieved.

[0027] When in use, the differential pressure switch 5 and the differential pressure sensor 6 are installed on the straight pipe section of the fan air inlet duct 4 to monitor the wind pressure in the duct and facilitate constant pressure control of the duct; the vibration sensor 7 is installed on the motor and the turbine fan 1 to test the working status of the motor and the turbine fan 1; the infrared sensing sensor 11 is installed on the bracket on the side of the transmission belt to monitor the status of the transmission belt; the Hall speed detection sensor 10 is installed near the motor transmission gear to detect the speed of the equipment. Once a specific part fails, the sensor will compare the data, determine the specific fault location, and promptly notify the relevant personnel in the laboratory through the data transmission channel and perform remote start and stop operations to shorten the time for handling crisis events.

[0028] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A laboratory intelligent exhaust fan, characterized in that: The invention comprises a turbine fan (1) and a programmable controller (3). The turbine fan (1) comprises a fan blade and a motor. The turbine fan (1) and the motor are arranged in a fan air inlet duct (4). A pressure difference switch (5) and a pressure difference sensor (6) are installed on the straight pipe section of the fan air inlet duct (4). The pressure difference switch (5) and the pressure difference sensor (6) are connected to the programmable controller (3). The turbine fan (1) and the motor are both provided with vibration sensors (7). Two vibration sensors (7) are connected to the programmable controller (3). The control signal input end of the turbine fan (1) is connected to the signal output end of a frequency converter (8). The signal input end of the frequency converter (8) is connected to the programmable controller (3) and the pipeline pressure difference sensor (9). The turbine fan (1) is installed with a Hall speed detection sensor (10), an infrared sensor (11) and a temperature sensor (12). The Hall speed detection sensor (10) is connected to the programmable controller (3).

2. A laboratory intelligent exhaust fan according to claim 1, characterized in that: The programmable controller (3) is provided with an analog input terminal AI (13), an analog output terminal AO (14), a digital input terminal DI (15), a digital output terminal DO (16), a DC24V power supply (17) and an RJ45 interface (2).

3. A laboratory intelligent exhaust fan according to claim 2, characterized in that: The pressure difference switch (5) is connected to the digital quantity input terminal DI (15) on the programmable controller (3).

4. A laboratory intelligent exhaust fan according to claim 2, characterized in that: The differential pressure sensor (6), the Hall speed detection sensor (10), the temperature sensor (12), the infrared sensor (11) and the vibration sensor (7) are all connected to the analog input terminal AI (13) on the programmable controller (3).

5. A laboratory intelligent exhaust fan according to claim 2, characterized in that: The differential pressure sensor (6), the Hall speed detection sensor (10), the temperature sensor (12), the infrared sensor (11) and the vibration sensor (7) are all connected to the DC24V power supply (17) on the programmable controller (3).

6. A laboratory intelligent exhaust fan according to claim 2, characterized in that: The digital quantity input terminal DI (15) of the programmable controller (3) is connected to the start / stop state signal output terminal of the frequency converter (8) to form a start / stop state feedback loop.

7. A laboratory intelligent exhaust fan according to claim 2, characterized in that: The digital quantity output terminal DO (16) of the programmable controller (3) is connected to the fan start / stop control signal input terminal of the programmable controller (3) to form a start / stop control loop for the turbo fan (1).

8. The intelligent laboratory exhaust fan according to claim 1, characterized in that: The output end of the motor is connected to a transmission belt and a transmission shaft of the fan blade via a pulley, the Hall speed detection sensor (10) is mounted on the pulley, the infrared sensing sensor (11) is mounted on a bracket on the side of the transmission belt, and the temperature sensor (12) is mounted on the housing of the motor.

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