负压称量室制药行业进行药粉称量、分装工艺环节专用的净化设备，垂直单向气流在主工作区不断循环，有效的控制药粉外溢和上扬，防止对人体的吸入危害，同时避免交叉污染，起到保护坏境及室内人员安全的作用。

工作原理

在负压称量室内进行操作时产生的少量粉尘首先由初、中效过滤器过滤后，再通过风机送入到高效静压箱，经高效过滤器过滤后有80% ~ 90%的洁净空气在均流膜的作用下均匀地送入到称量罩工作区域内，有10% - 20%的洁净空气直接排至称量罩外，这样在称量罩的工作区域内始终形成负压气流，确保粉尘不会向外污染房间。

公司产品特性及配置说明：

●模块化设计、安装灵活、简单，内侧和地面连接处采用一体式圆弧结构；

●风速侦测自动变频系统，使工作区风速始终处于均匀稳定运行状态（0.45土20% m/s）；

●过滤器前后压差显示（可采用压差表直接显示或触摸屏显示），实时监控各道过滤器的有效运行，并有压差超限报警显示；

设计思路

●主工作区独特的气流分流设计，确保称量罩工作区内为负压气流，有效保护了人员安全，避免了环境污染和产品交叉污染；

●智能化控制模式和故障报警系统，有效保证运行的可靠性；

●人性化的设计，使各类过滤器更换操作更加方便，独特风道设计，有效控制了整机工作噪声；

●配置多个防护等级为|P66的工业插座，用于设备内电子称量器具取电用；

●可根据用户要求配置全套西门子触摸屏、PLC控制器及变频器；也可简易配置，直接采用变频器的外接面板调节控制；

●可选装冷却盘管或空凋，平衡运行过程中产生的热量；

●全部根据用户要求定制非标尺寸的称量室。

The negative pressure weighing room is apurification device specialized for medicine powder weighing  flling in pharmaceutical industry. Thevertical unidirectional flow keeps circulating in main working area to effectively control medicine spiand rising to prevent inhalation hazard to humanbody, mean while to avoid cross contamination  protect environment   indoor personnel safety

Working principle

A small amount of dust generated during operationin the weighing chamber is first fitered by primary  medium efficiency filters,  then fed into highefficiency

plenum chamber through fan, after filtered by HEPA filter, about 80-90% clean air isuniformly fed into the weighing hood working area under effect of membrane.   10-20% clean air isdirectly exhausted outside weighing hood, thushere is always negative pressure air flow in the working area of weighing hood, to avoid dustpollution outside to the room.

Product features   configuration instructions

●The modular design is suitable for flexible  simple installation, the internal  ground connections adopt integrated arc structureo

●The wind speed monitor automatic frequency converting system is used to make the wind speed at working area always at uniform  steady state(0.45+20%m/s)

●The filter front  rear pressure difference display(displayed by differential pressure gauge  touch screen) can real-time monitor the effective operation of each filter, with pressure difference over limit alarm display

●The unique shunt air flow design at main working area can ensure that the air flow at weighing cover area is negative pressure, to effectively protect the personnel safety  avoid environmental pollution  product cross-contamination

●The intelligent control mode  fault alarm system can effectively guarantee the reliability of operation

●The user-friendly design can make the filter change more convenient Unique wind duct design can effectively control the machine operation nolse

●Various iP66 industrial sockets can be configured for electronic weighing device power supply

●The full set of Siemens touch screen, PLC  inverter can be configured according to user requirements,  it can be easily configured to directluse inverter external panel to make adjustment  control

●The cooling coil  air conditioner is optional to balance the heat generated in the process of operation

●The non-standard size weighing room can be customized according with customer requirement