System for controlling variable air rate ventilating laboratory in segments

Abstract

The invention discloses a system for controlling variable air rate ventilating laboratory in segments and is used for leading waste gas generated in a scientific experiment process to discharge outside. The system comprises a frequency conversion fan, a static pressure box, an air valve and fume chambers, wherein a first ventilated section is from the frequency conversion fan to the static pressure box, the frequency conversion fan is arranged on a housetop or outside and is connected with the static pressure box through a ventilating duct; the static pressure box is arranged close to a ventilated terminal, and the specific position of the static pressure box is a geometric center of multiple fume chamber positions; the static pressure box is provided with a pressure sensor, and the pressure sensor can detect air pressure value in the static pressure box so as to adjust the rotation rate of a fan; and a second ventilated section is from the static pressure box to the terminal, the static pressure box is connected with the fume chambers through the ventilating duct, a manual drive air valve is arranged between the static pressure box and the fume chambers and is used for adjusting air quantity, and a motor-driven air valve is arranged and used for variable air rate control in work. The ventilating system provided by the invention adopts a segmentation control mode on ventilation, thereby realizing exact adjustment of each part air quantity and being capable of reducing ventilated noises and ventilated energy consumption.

Description

technical field [0001] The invention relates to a ventilation system, in particular to a laboratory section-controlled variable air volume ventilation system. Background technique [0002] The ventilation of the laboratory plays a vital role in the environmental quality of the laboratory and the health of laboratory operators. In order to prevent the pollutants generated in the experiment from spreading into the laboratory, all kinds of laboratories are equipped with ventilation systems. . However, the existing ventilation system either does not have the function of air volume control. As long as one fume hood in the system is turned on, the exhaust motor will run at full capacity, which is not conducive to energy saving; The pressure difference with the outside world is used to adjust the operation of the fan. Although this can play a certain role in energy saving, it cannot accurately control the exhaust air volume of the fume hood. The fume hood is powerful, but the fum...

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Problems solved by technology

However, the existing ventilation system either does not have the function of air volume control. As long as one fume hood in the system is turned on, the exhaust motor will run at full capacity, which is not conducive to energy saving; The pressure difference with the outside world is used to adjust the operation of the fan. Although this can play a certain role in energy saving, it cannot accurately control the exhaust air volume of the fume hood. Fume hoods that are far away from the main ventilation duct may have insufficient exhaust air volume and even cause pollutants to spread indoors

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