1. What is the function of the high-efficiency air supply port static pressure box?

The high-efficiency air supply port static pressure box is mainly located between the air inlet interface and the high-efficiency filter.。

Its main functions can be summarized as:

Air coming from the air duct → Static pressure box buffering and distribution → Entering the filter → Filtration → Clean room

When air enters the high-efficiency air supply outlet from the air duct, the air flow state may be affected by factors such as the length of the air duct, elbows, diameter reduction, and interface location.

The static pressure box provides a certain internal space so that the air entering the end can be buffered and redistributed before entering the high-efficiency filter area.

Therefore, the static plenum is not an independent air purification device, but an integral part of the end structure of the efficient air supply port.

2. Why do high-efficiency air supply vents need a static plenum?

The air has a certain speed and direction when flowing in the air duct.

If there is no suitable transition space before entering the filter, the local airflow may be affected by the direction and structure of the air inlet.

A static plenum can provide a relatively stable transition area.

The basic process can be understood as:

Air duct airflow→enters the static pressure box→airflow buffer→airflow distribution→filter→clean room

The purpose is not to simply add a box, but to make the terminal air supply structure better adapt to the air flow state before the air enters the filter.

3. What problems does the static pressure box mainly solve?

The high-efficiency air supply port static pressure box mainly plays a role in 'the air flow organization before the air enters the filter'.

It can be understood from several aspects:

The actual effect is also related to the size of the static pressure box, air volume, air inlet method, filter resistance and internal structure.

Therefore, the overall performance of an efficient air supply outlet cannot be judged solely by 'whether there is a static pressure box'.

4. Where is the position of the static plenum box in the high-efficiency air supply vent?

Common structures can be understood as:

Air supply duct → Air inlet interface → Static pressure box → HEPA/ULPA filter → Diffusion device → Clean room

in:

• Ducts are responsible for transporting air;

• The air inlet interface is responsible for connection;

• The plenum is responsible for transition, buffering and airflow distribution;

• HEPA/ULPA is responsible for air filtration;

• The diffuser is responsible for the terminal air supply organization.

Therefore, the plenum is the duct system and the filter .an important transition area between

5. What is the relationship between the static pressure box and the high-efficiency filter?

The two have different functions.

The high-efficiency filter is mainly responsible for air filtration, while the static pressure box is mainly responsible for the air flow transition before the air enters the filter.

It can be simply understood as:

Static plenum: Makes air more suitable for entering the filter

HEPA/ULPA: Filter the air

Therefore, the static pressure box cannot replace the high-efficiency filter, and the high-efficiency filter cannot replace the static pressure box.

In the design of efficient air supply outlets, the two need to match their structures and parameters.

6. Will the static pressure box affect the air volume?

meeting.

There is a pressure loss throughout the terminal air supply system.

The structure, internal dimensions, air inlet method and air flow state of the high-efficiency air supply port plenum box itself may have an impact on system resistance.

at the same time,the HEPA or ULPA filter itself.There is also resistance within

Therefore, it is necessary to consider comprehensively:

Duct resistance + static pressure box resistance + filter resistance + other end resistance

Then determine the required air volume and static pressure conditions for the system.

This is why high-efficiency air supply vents cannot be selected based solely on 'filter size'.

7. Is the bigger the plenum the better?

no.

The bigger the plenum is not the better.

When designing, you need to combine:

• Design air volume

• filter area

• Air intake method

• Cabinet size

• Ceiling height

• Technology mezzanine space

• airflow organization

• system resistance

Determined comprehensively.

If the on-site technical mezzanine height is limited, an oversized plenum may make installation more difficult.

Therefore, the plenum size should match the actual engineering conditions.

8. What is the difference between top-inlet and side-inlet static plenums?

The main difference between the two structures is the direction in which air enters the plenum.

Top air intake

Top air duct → top air inlet → static pressure box → filter → clean room

It is suitable for the situation where the air duct enters from above the air supply outlet.

Side air intake

Side air duct→ Side air inlet→ Static plenum→ Filter→ Clean room

It is suitable for the case where the air duct is arranged from the side.

The specific choice depends on the site air ducts, technical mezzanines and suspended ceiling structures.

9. What effect does the static pressure box have on the uniform air flow?

High-efficiency filters generally require larger filter areas.

If the air distribution entering the filter is unreasonable, local airflow concentration may occur.

The plenum provides space for air to be redistributed before entering the filter.

Therefore, when properly designed, the plenum can help improve the organization of airflow into the filter area.

But please note:

Static plenums alone cannot ensure uniform airflow in a clean room.

The final airflow organization of the clean room is also related to the number, location, air volume, return air mode, room structure and equipment layout of the air supply outlets.

10. What is the difference between a static plenum and an air duct?

Both are related to air transport but have different functions.

Therefore, the static plenum cannot simply be understood as a short section of air duct.

11. What is the difference between a static pressure box and an ordinary air supply box?

It depends on the product structure and design usage.

In high-efficiency air supply vents in clean rooms, the static pressure box is usually combined with the high-efficiency filter installation structure and is used for air transition and distribution at the front end of the filter.

Ordinary air supply boxes may only bear the function of air transportation or air supply structure, and may not be equipped with high-efficiency filters.

Therefore, when purchasing, you need to confirm whether the product has:

Filter installation structure + sealing structure + adapted air inlet interface + terminal air supply structure

Don't just look at the product name.

12. What parameters need to be considered in plenum design?

When designing a high-efficiency air supply plenum box, it is recommended to confirm at least the following parameters:

These parameters need to be judged together.

13. Do I need to choose a static pressure box together with a HEPA filter?

It is recommended to consider together.

Because the size, filter area and resistance of the filter will affect the design of the static pressure box and the overall air supply port.

For example, changing to different specificationsHEPA filters may need to be reconfirmed:

Filter size → Installation structure → Static pressure box space → Air inlet mode → System air volume and static pressure

Therefore, when purchasing high-efficiency air supply vents, it is best to determine the filter specifications at the same time rather than replacing them at will later.

14. What is the relationship between the static pressure box and the air flow organization of the clean room?

The static pressure box is only a link in the terminal air supply structure.

A complete cleanroom airflow organization usually includes:

Air treatment → Air duct transportation → Static plenum → High-efficiency filtration → Air supply → Clean area → Return air

Therefore, the role of the static pressure box needs to be understood in the context of the entire system.

If the number of air supply outlets, layout location, return air method, or equipment layout are unreasonable, simply adjusting the plenum will not solve all airflow problems.

15. How does Aili Industrial match the high-efficiency air supply port static pressure box?

In the high-efficiency air supply outlet project, Aili Industrial can match the air inlet method, box structure, filter specifications and installation conditions according to the actual project parameters.

Especially non-standard clean projects require comprehensive confirmation:

Cleanliness level → Design air volume → Filter → Air inlet method → ​​Static pressure box → Ceiling structure → Maintenance method

Aili Industrial also has HEPA/ULPA filters, FFU, EFU and other clean air treatment products, and can choose corresponding products according to the needs of different areas of the project.

For example:

Central air conditioning duct system → High-efficiency air supply outlet + HEPA

Modular circulating air system → FFU + HEPA/ULPA

Partial purification at the equipment end → EFU + HEPA/ULPA

Different areas can adopt different terminal purification methods according to actual needs.

16. How to judge whether a plenum design is appropriate?

It can be judged from the following aspects:

Therefore, the static plenum is not purchased separately and then other parameters are considered, but should be included as part of the overall design of the efficient air supply vent.

17. Summary

The high-efficiency air supply port static pressure box is mainly located between the air inlet interface and the high-efficiency filter , and is mainly responsible for the transition, buffering and distribution of air after it enters the end.

Its basic working process is:

Air duct → Air inlet interface → Static pressure box → HEPA/ULPA filter → Diffusion device → Clean room

The specific size and structure of the static pressure box need to be designed based on the air volume, filter specifications, air inlet method, installation space and clean room air flow organization.

In actual projects, we cannot just focus on the static pressure box itself, but also need to consider the air ducts, filters, air supply outlets and the entire clean room system.

Aili Industry can select high-efficiency air outlets, HEPA/ULPA filters, FFU, EFU and other products based on the actual conditions of the clean room project, and provide matching clean air treatment equipment for different areas.

18. FAQ

Q: Is the high-efficiency air supply port static pressure box a filter?

no. The static pressure box is mainly responsible for the transition and distribution of air before entering the filter, while the high-efficiency filter is responsible for air filtration.

Q: Is the bigger the static pressure box, the better?

no. It needs to be determined comprehensively based on the air volume, filter specifications, air inlet method, installation space and system design conditions.

Q: Can the high-efficiency air supply vent be used without a static pressure box?

Depends on product structure and system design. Some high-efficiency air supply vents adopt a static pressure box structure, and some product structures are different, which should be judged based on specific product design and project requirements.

Q: Will the static pressure box affect the air volume of the high-efficiency air supply outlet?

meeting. The static plenum is part of the terminal air channel, and its structure will affect the system pressure loss, so it needs to be matched with the air volume, filter resistance and air duct system.

Q: Does the static pressure box need to be designed together with the HEPA filter?

It is recommended to consider together. The size and resistance of the filter will directly affect the internal structure of the air supply port and the static pressure condition of the system.