1.风量平衡的影响因素

 

1 influencing factors of air volume balance

 

洁净厂房设计施工的风量平衡是洁净室维持正压值和洁净度的保证。无尘车间出现风量不平衡的主要因数有：

 

The air flow balance in the design and construction of the clean room is the guarantee of maintaining the positive pressure value and cleanliness of the clean room. The main factor of the air flow in the dust free workshop is:

 

（1）初、中、高效过滤器随着使用时间的增加。阻力也会增加，造成送风量减少，室内正压值发生变化。

 

(1) at the beginning, middle and high efficiency filters increase with time. Resistance will also increase, resulting in reduced air supply, indoor positive pressure value changes.

 

（2）生产工艺发生变化，排风量增加或减少造成无尘车间室内正压值的减少或增加。

 

(2) changes in production processes, increase or decrease in the amount of exhaust air or decrease or increase the positive pressure value of the dust free workshop.

 

（3）随着无尘车间投入使用时间的增加，围护结构和门窗出现漏风现象，造成无尘车间内正压值发生变化。

 

(3) with the dust-free workshop put into use time increased, the envelope and the doors and windows appear leakage phenomenon, cause dust-free workshop in positive pressure value changes.

 

（4）管理不善，人员和设备的出入口、门或气闸室关闭不严，造成无尘车间内正压发生变化。

 

(4) mismanagement, personnel and equipment import and export, door, or airlock closes lax, resulting in dust-free workshop in positive pressure change.

 

（5）送风机皮带松动或转速降低造成送风量不足。

 

(5) the belt is loose or the speed of the fan is reduced and the air supply is reduced.

 

（6）个别FFU的风机或电机发生故障，停止运行造成循环风量不足。

 

(6) the FFU of the wind turbine or motor failure, to stop the operation of the circulation caused by insufficient.

 

2.解决风量不平衡的措施

 

2 to solve the air flow imbalance measures

 

（1）洁净厂房设计施工 http://www.jnjkjh.com/ 选用过滤器风量时选用过滤器额定风量的75%~80%，随着过滤器阻力的增加，逐步加大送风阀门的开度，直到过滤器达到终阻力时更换过滤器。

 

(1) clean plant design and construction of the selection of the filter air filter rated air 75%~80%, with the increase in the filter resistance, and gradually increase the opening of the wind valve, until the filter to reach the final resistance when the replacement filter.

 

（2）空调箱的送风机或FFU的送风机采用变频电机，初运行时将送风机或FFU的电机运行频率调低，随着运行时间的增加，过滤器阻力也增加时逐步调高电机频率以保证达到设计送风量。

 

(2) the air conditioner or FFU of the air conditioner adopts frequency conversion motor, and the motor operating frequency of the blower or FFU is reduced, with the increase of running time, the frequency of the filter increases with the increase of the frequency of the motor.

 

（3）当工艺排风量发生变化时，调整系统的新风量，这就必须把新风系统设计成变风量系统以求得排风和新风达到平衡，否则当工艺发生变化时排风量不能增加或减少。

 

(3) when the process is changed, the fresh air volume of the system should be designed as a variable air volume system to achieve the balance between the wind and the wind.

 

（4）加强洁净空调系统的运行管理，提高管理人员的素质。制定严密的管理制度。

 

(4) strengthen the operation management of the clean air conditioning system, improve the quality of the management personnel. Formulate strict management system.

 

（5）洁净厂房设计施工应配备压差表测试仪器，当正压值发生变化时及时报警，采取相应措施保证无尘车间的正压值。

 

(5) the design and construction of clean plant should be equipped with a pressure difference meter test instrument, when the positive pressure value changes, the timely warning, to take corresponding measures to ensure that the normal pressure value of the workshop.