目前余压阀的结构一般包括阀板、调节重锤、过滤网等几个部分，工作时，阀板开启一定角度，让一定量的气流通过。重锤在不同位置，阀板所受压力不同，相同室内压力下，阀板的开启度不同，可起到调节作用。

 

The residual pressure valve structure generally consists of several parts of the valve plate, adjust the hammer, filters, and other, the work, the valve plate open a certain angle, make a certain amount of airflow through. The hammer in different position, the valve plate is subjected to different pressure, under the same indoor pressure, valve plate open degree different to regulatory role.

 

目前余压阀安装简单，灵敏度高，因此使用很广泛，但是，在使用中存在以下问题。

 

At present, the residual pressure valve is simple, high sensitivity, so it is widely used, but in the use of the following problems.

 

1 外形尺寸所造成的问题

 

1 the problem caused by the shape size

 

因为现有余压阀的工作机制是室内压力推开阀板进行泄压，因此，阀板和调节重锤部分突出墙面。通常，余压阀被要求安装在洁净室的下风侧墙壁上，因此，突出部分便成为人流或物流的障碍。也正因为如此，很多工程实施时，将余压阀按装在洁净室墙壁上方，以避免此类不便，这样，造成了洁净室气流组织上的不合理。

 

Because the existing residual pressure valve the working mechanism is indoor pressure open valve plate for pressure relief. Therefore, the valve plate and regulation weight portion protruding wall. Usually residual pressure valve is installed in the clean room of the leeward side walls. Therefore, prominent part has become obstacles to abortion or logistics. Also because of this, many projects are implemented, will be installed on the wall of the remaining pressure in the clean room, to avoid this inconvenience, so that caused a clean room air flow organization unreasonable.

 

2 不可精准度量及调整

 

2 can not be accurate measurement and adjustment

 

现有余压阀虽然具有调节部分，但是，在实际使用时，并不能将调节重锤的某个位置和房间的正压值对应起来。重锤位置的调整和房间压力的变化，都会引起阀板开度变化，但并不能就此简单标定重锤位置和房间压力的关系。在实际应用中，还牵涉到同一个洁净空间使用什么规格及多少数量余压阀的问题。同一个洁净空间，在同样的正压情况下，使用一个余压阀和使用多个同规格余压阀，阀板的开度是不同的。

 

Existing residual pressure valve, although is regulated, in part, however, in actual use, will not adjust the hammer of a location and the room of the positive pressure values correspond. Heavy hammer position adjustment and room pressure changes, will lead to valve plate opening degree of change, but it is not this simple calibration of the relationship between the position of the hammer and room pressure. In practical application, it also involves the use of the same clean space and the number of the number of remaining pressure valve. The same clean space, in the same positive pressure, the use of a residual pressure valve and the use of multiple with the same specifications than the pressure valve, the valve plate is different.

 

因此，使用余压阀的洁净室的管理者会有一些困惑：现在余压阀的调节是不是最佳状态呢？现在余压阀板开度很大，房间压力是不是过大了呢？或者现在余压阀阀板开度很小，房间压力是不是需要调大呢？应该调节余压阀的重锤还是调节回风阀呢？

 

Therefore, the use of residual pressure valve of the clean room management will be a number of confusion: now more than the adjustment of the valve is not the best state of it? Now more than a large pressure valve plate, room pressure is not too big? Or now more than the valve plate opening is very small, the room pressure is not required to adjust it? We should adjust the residual pressure valve of the hammer or adjusting the air return valve?

 

3 噪音问题

 

3 noise problem

 

现有余压阀还存在噪音问题，在房间压力出现大的波动时（开门瞬间等） ，阀板快速关闭，会产生比较大的噪音，有些型号的余压阀在关闭部位贴了密封胶条，一定程度上可以降低噪音。

 

Existing pressure valve is still a noise problem, the room pressure in a large fluctuations (open door, etc.), the valve plate is quickly closed, will produce a relatively large noise, some types of excess pressure valve in the closed parts of the sealing tape, to a certain extent can reduce noise.