Variable-frequency variable-air-volume air pressure balancing system and method for laboratory waste gas treatment equipment

Abstract

The invention discloses a variable-frequency variable-air-volume air pressure balancing system and method for laboratory waste gas treatment equipment. The system comprises an air feeder, an exhaust fan, air feeding tubes, exhaust air tubes, air feeding volume adjusting valves, exhaust air volume adjusting valves, a pressure sensor, an air volume sensor, a variable-frequency controller and a control terminal module, wherein the air feeder communicates with a plurality of indoor spaces through the air feeding tubes correspondingly, and the air feeding volume adjusting valve is mounted on each air feeding tube; the exhaust fan communicates with the plurality of the indoor spaces through the exhaust air tubes correspondingly, and each exhaust air tube is provided with an exhaust air volume adjusting valve; pressure sensors are respectively arranged in the plurality of indoor spaces and are used for acquiring indoor real-time pressure values; the control terminal module is used for receiving the indoor real-time pressure value transmitted by the pressure sensor and the air speed value transmitted by the air volume sensor and controlling the working states of the air feeding volume adjusting valves, the exhaust air volume adjusting valves, the air feeder and the exhaust fan in real time, so that the stability of the indoor pressure is effectively kept, and the indoor pressure is flexibly controlled.

Description

technical field [0001] The invention relates to the technical field of ventilation control, in particular to a frequency-variable air volume and air pressure balancing system and method for laboratory waste gas treatment equipment. Background technique [0002] During the experiment, the toxic and harmful gases produced will bring great harm to the experimenters. In order to protect the physical and mental health of the laboratory personnel and the safe experimental environment in the laboratory, it is necessary to discharge the toxic and harmful gases from the laboratory. Discharging toxic and harmful gases into the atmosphere without treatment will affect the natural environment, pollute the atmosphere, and affect human survival. Therefore, they must be treated before they can be discharged. [0003] In the laboratory ventilation system, multiple exhaust gas treatment equipment are connected together. When the frequency conversion system is used to control, the air volume ...

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Problems solved by technology

[0002] During the experiment, the toxic and harmful gases produced will bring great harm to the experimenters. In order to protect the physical and mental health of the laboratory personnel and the safe experimental environment in the laboratory, it is necessary to discharge the toxic and harmful gases from the laboratory. Discharging toxic and harmful gases into the atmosphere without treatment will affect the natural environment, pollute the atmosphere, and affect human survival. Therefore, they must be treated before they can be discharged.

[0003] In the laboratory ventilation system, multiple exhaust gas treatment equipment are connected together. When the frequency conversion system is used to control, the air volume of the main air duct can only be controlled. Only when the wind pressure of the main air duct changes is felt, the fan is adjusted No adjustments can be made to the surface wind speed at the end of the exhaust gas treatment equipment

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