实验室气体管路系统

通风系统

风机：Fan

生物安全柜：Biosafety cabinet

文丘里送风阀：Venturi blow valve

读卡器：Card reader

走廊：Aisle

独立换气式笼架：Independent ventilation cage rack

文丘里排风阀：Venturi exhaust valve

饲养室：Feeding room

实验室：Laboratory

缓冲阀：Buffering valve

定风量控制系统（Constant Volume system）

无论通风柜调节窗开度如何，风量始终保持一定。系统特性：控制简单，

但面风速会随着调节窗位置而不断变化，安全性能差，而且能耗惊人。

The air volume should keep constant no matter how the fume hoods adjusting window opening is. System features: simple control, but surface wind speed may change

 with the position of adjusting window, poor safety performance and amazing energy consumption.

排风：Air exhaust

定风量阀：Constant air volume valve

通风柜：Fume hoods

定风量阀：Constant air volume valve

送风：Air supply

余风量：Remaining air volume

送风量：Air output

排风：Air exhaust

送风：Air supply

CAV系统送、排风量不随时间的变化而变化：

Air supply and exhaust volume of CAV system do not change with time

时间：Time

变风量控制系统（VAV）

Variable air volume control system

变风量控制系统是通过实验室内通风柜开启度的变化量来调节系统的送、排风量，从而保障通风柜面风速为0.5m/s。

系统安全性提高，适应性强，可以在充分保障安全的前提下降低能耗。

Variable air volume control system is to adjust the system air supply and exhaust volume according to the change of fume hoods opening

degree in laboratory, thus guaranteeing the surface wind speed of fume hoods is 0.5m/s. The system safety is improved and adaptability is strengthened,

reducing energy consumption under the premise of fully ensuring safety.

排风阀：Air exhaust valve

排风：Air exhaust

排风阀：Air exhaust valve

变风量：Variable air volume

全面排风：Comprehensive air exhaust

变风量通风柜：Variable air volume fume hoods

余风量：Remaining air volume

送风：Air supply

变风量补风：Variable air volume supplementary

房间控制器：Room controller

送风阀：Air supply valve

风量：Air volume

排风：Air exhaust

送风：Air supply

时间：Time

系统最小安全风量：System minimum safety air volume

实验室送、排风量随排风柜调节窗位置改变而改变：

Laboratory air supply and exhaust volume change with the variation of fume hoods adjusting window position

排风柜正常工作状态下，系统送、排风量：

System air supply and exhaust volume when fume cabinet is under normal working state