How to choose EFU dimensions? Confirmation method from equipment drawings to installation space

Direct answer: EFU overall dimensions should be determined by both device structure and airflow requirements. Selecting only based on the length and width of the equipment opening, it is easy to ignore the air inlet margin, fan maintenance, filter replacement, wire harness interface and air outlet coverage. The correct approach is to first put the EFU as an equipment module into the complete machine drawing for inspection, and then confirm the performance parameters.

First confirm the three sets of sizes

The first group is the maximum length, width, and height allowed by the equipment; the second group is the clean air supply area that needs to be covered; and the third group is the interface size of the mounting holes, flanges, buckles, or supporting edges. The three groups of dimensions should be marked separately, and the opening size cannot be directly equated with the overall appearance of the machine.

Height must include air intake and maintenance conditions

When the space at the top of the equipment is limited, you need to confirm the overall height of the EFU instead of just asking about the height of a certain component of the cabinet. At the same time, check whether there are covers, air ducts, cable trays above, and which direction the filter or fan is disassembled and installed.

Length and width determine coverage and also affect internal layout

After the length and width are expanded, the filtration area may increase, but the number, location and box reinforcement methods of the fans also need to be adjusted accordingly. If the shape of the air supply area is irregular, special-shaped boxes or multiple small-sized EFUs can be combined, but mutual interference between the air outlet blind area and the airflow of adjacent units should be avoided.

Interfaces that should be checked during drawing review

It is recommended to mark the equipment reference plane, center distance of installation holes, fastener space, air inlet and outlet directions, power supply and communication interfaces, wiring bending radius, filter replacement direction and maintenance tool operating space in the drawings.

Performance review after size confirmation

After the size is determined, the effective area of ​​the filter, rated air volume, working static pressure, face wind speed and uniformity need to be reviewed. If the size is reduced but the target air volume remains unchanged, the face speed, resistance, noise and motor load may all change.

Project confirmation checklist

FAQ

Is larger EFU size better?

no. The air supply range, equipment space and air volume requirements should be matched. If it is too large, it will increase the installation and maintenance burden.

The equipment only has a hole drawing, can it be customized directly?

It is recommended to supplement the surrounding structure, available height, air inlet conditions and maintenance direction, otherwise interference may easily occur.

Why do you need a prototype after size confirmation?

In ultra-thin, small size or high wind speed projects where structural changes will affect the actual operating point, the prototype can be used to verify air volume, uniformity, noise and interfaces.

How does Aili Industry cooperate with equipment-side EFU projects?

Aili Industry carries out R&D and production around EFU complete machines, fans and motors, control systems, sheet metal structures and air filters. For equipment-side projects, configuration can be carried out based on equipment drawings, target air volume, static pressure, filtration efficiency, installation interface and control logic. When it comes to ultra-thin, small size or special interfaces, it is recommended to confirm the drawings and agreed working conditions first, and then test the curing parameters through the prototype so that the configuration can be consistent in subsequent mass production.

During project consultation, the available internal length, width and height of the equipment, target cleanliness, air supply area, air volume or wind speed requirements, filtration efficiency, power supply and communication methods can be provided to facilitate quick judgment of whether standard products are suitable or whether non-standard design is required.

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Conclusion: EFU size selection should be checked from five aspects: available space of the equipment, target air supply area, air inlet and outlet conditions, installation interface and maintenance path. Just because the shape can be put in does not mean that the air volume, coverage and maintenance requirements are met.